Here are the 100 most important words starting with the letter A, along with their English and Hindi meanings to boost up your vocabulary:
1. Abandon-
English Meaning: To leave behind or give up
Hindi Meaning: छोड़ देना
2. Abate-
English Meaning: To lessen in amount or intensity
Hindi Meaning: कम होना
3. Abdicate-
English Meaning: To give up power or responsibility
Hindi Meaning: त्याग देना
4. Abhor-
English Meaning: To hate or loathe intensely
Hindi Meaning: घृणा करना
5. Ability-
English Meaning: The power or skill to do something
Hindi Meaning: क्षमता
6. Ablaze-
English Meaning: On fire, burning
Hindi Meaning: जलता हुआ
7. Abridge-
English Meaning: To shorten or condense
Hindi Meaning: संक्षिप्त करना
8. Absolute-
English Meaning: Complete, unconditional
Hindi Meaning: पूर्ण
9. Abstain-
English Meaning: To refrain from, avoid
Hindi Meaning: बचना
10. Abundance-
English Meaning: A large quantity of something
Hindi Meaning: प्रचुरता
11. Accept-
English Meaning: To receive willingly
Hindi Meaning: स्वीकार करना
12. Access-
English Meaning: The ability or right to enter or use something
Hindi Meaning: पहुँच
13. Accomplish-
English Meaning: To complete or achieve
Hindi Meaning: पूरा करना
14. Accord-
English Meaning: To give or grant
Hindi Meaning: अनुमति देना
15. Account-
English Meaning: A record or statement of financial transactions
Hindi Meaning: खाता
16. Accuracy-
English Meaning: The quality of being precise or exact
Hindi Meaning: सटीकता
17. Accuse-
English Meaning: To charge with a crime or wrongdoing
Hindi Meaning: आरोप लगाना
18. Achieve-
English Meaning: To successfully complete or attain
Hindi Meaning: प्राप्त करना
19. Acquire-
English Meaning: To obtain or gain possession of
Hindi Meaning: प्राप्त करना
20. Action-
English Meaning: Something done or performed
Hindi Meaning: कार्य
21. Active-
English Meaning: Engaged in physical or mental activity
Hindi Meaning: सक्रिय
22. Actual-
English Meaning: Existing in fact, real
Hindi Meaning: वास्तविक
23. Adapt-
English Meaning: To adjust or modify for a new use or purpose
Hindi Meaning: अनुकूलित करना
24. Add-
English Meaning: To combine two or more things
Hindi Meaning: जोड़ना
25. Admire-
English Meaning: To respect or appreciate greatly
Hindi Meaning: प्रशंसा करना
26. Admit-
English Meaning: To allow to enter or acknowledge
Hindi Meaning: स्वीकार करना
27. Adult-
English Meaning: A person who has reached maturity
Hindi Meaning: वयस्क
28. Advance-
English Meaning: To move forward or progress
Hindi Meaning: आगे बढ़ना
29. Adventure-
English Meaning: An exciting or unusual experience
Hindi Meaning: साहसिक कार्य
30. Adversary-
English Meaning: An opponent or enemy
Hindi Meaning: विरोधी
31. Advertise-
English Meaning: To promote or make known publicly
Hindi Meaning: विज्ञापन करना
32. Advocate-
English Meaning: To support or recommend publicly
Hindi Meaning: पक्षपाती
33. Aesthetic-
English Meaning: Relating to beauty or artistic appreciation
Hindi Meaning: सौंदर्य
34. Affair-
English Meaning: An event or situation
Hindi Meaning: संबंध
35. Affection-
English Meaning: A feeling of love or fondness
Hindi Meaning: प्रेम
36. Affirm-
English Meaning: To state or assert positively
Hindi Meaning: स्थापित करना
37. Afford-
English Meaning: To be able to buy or pay for something
Hindi Meaning: संभव होना
38. Age-
English Meaning: The length of time a person has lived
Hindi Meaning: उम्र
39. Aggravate-
English Meaning: To make worse or more severe
Hindi Meaning: बढ़ाना
40. Agile-
English Meaning: Quick and light in movement or thought
Hindi Meaning: फुरतीला
41. Aim-
English Meaning: To point or direct at a target
Hindi Meaning: लक्ष्य
42. Air-
English Meaning: The mixture of gases we breathe
Hindi Meaning: हवा
43. Alarming-
English Meaning: Causing fear or concern
Hindi Meaning: चौंकाने वाला
44. Alert-
English Meaning: Watchful and ready for action
Hindi Meaning: चौकन्ना
45. Alienate-
English Meaning: To cause to feel isolated or estranged
Hindi Meaning: अलग करना
46. Align-
English Meaning: To bring into line or agreement
Hindi Meaning: संरेखित करना
47. Allegiance-
English Meaning: Loyalty or devotion to a person or cause
Hindi Meaning: निष्ठा
48. Allocate-
English Meaning: To distribute or assign for a specific purpose
Hindi Meaning: आवंटित करना
49. Allow-
English Meaning: To permit or give permission
Hindi Meaning: अनुमति देना
50. Allure-
English Meaning: To attract or entice with something desirable
Hindi Meaning: मोहित करना
51. Ally-
English Meaning: A friend or partner in a common cause
Hindi Meaning: सहयोगी
52. Alone-
English Meaning: Without anyone else
Hindi Meaning: अकेला
53. Alter-
English Meaning: To change or modify
Hindi Meaning: बदलना
54. Altruism-
English Meaning: Selfless concern for the welfare of others
Hindi Meaning: उदारता
55. Ambiguous-
English Meaning: Open to more than one interpretation
Hindi Meaning: अस्पष्ट
56. Ambition-
English Meaning: A strong desire to achieve something
Hindi Meaning: महत्वाकांक्षा
57. Amuse-
English Meaning: To entertain or make someone laugh
Hindi Meaning: मनोरंजन करना
58. Analysis-
English Meaning: Detailed examination of something
Hindi Meaning: विश्लेषण
59. Ancestor-
English Meaning: A person from whom one is descended
Hindi Meaning: पूर्वज
60. Anger-
English Meaning: A strong feeling of displeasure or hostility
Hindi Meaning: गुस्सा
61. Angle-
English Meaning: A geometric figure formed by two lines meeting at a point
Hindi Meaning: कोण
62. Animosity-
English Meaning: Strong hostility or hatred
Hindi Meaning: वैर
67. Ankle-
English Meaning: The joint connecting the foot and the leg
Hindi Meaning: टखना
68. Announce-
English Meaning: To make a public or official statement
Hindi Meaning: घोषणा करना
68. Annoy-
English Meaning: To irritate or bother someone
Hindi Meaning: परेशान करना
69. Annual-
English Meaning: Occurring once a year
Hindi Meaning: वार्षिक
70. Anonymous-
English Meaning: Having an unknown or undisclosed name
Hindi Meaning: गुमनाम
71. Answer-
English Meaning: A response to a question or statement
Hindi Meaning: जवाब
72. Antagonize-
English Meaning: To cause hostility or opposition
Hindi Meaning: विरोध करना
73. Anticipate-
English Meaning: To expect or look forward to
Hindi Meaning: आशा करना
74. Anxiety-
English Meaning: A feeling of worry or nervousness
Hindi Meaning: चिंता
75. Apathy-
English Meaning: Lack of interest or emotion
Hindi Meaning: उदासीनता
76. Apologize-
English Meaning: To express regret or say sorry
Hindi Meaning: माफी मांगना
77. Apparent-
English Meaning: Clearly visible or understood
Hindi Meaning: स्पष्ट
78. Appeal-
English Meaning: To make a request or plea
Hindi Meaning: अपील करना
79. Appearance-
English Meaning: The way something looks or seems
Hindi Meaning: दिखावा
80. Appreciate-
English Meaning: To recognize the value or worth of something
Hindi Meaning: मूल्यांकन करना
81. Approach-
English Meaning: To come closer to something or someone
Hindi Meaning: पास जाना
82. Approval-
English Meaning: Agreement or consent
Hindi Meaning: स्वीकृति
83. Arouse-
English Meaning: To awaken or stimulate
Hindi Meaning: उत्तेजित करना
84. Arrange-
English Meaning: To put things in order or organize
Hindi Meaning: व्यवस्था करना
85. Arrogance-
English Meaning: Excessive pride or self-importance
Hindi Meaning: अहंकार
86. Articulate-
English Meaning: To express oneself clearly and effectively
Hindi Meaning: स्पष्ट व्यक्त करना
87. Ascend-
English Meaning: To go up or climb
Hindi Meaning: चढ़ना
88. Ashamed-
English Meaning: Feeling embarrassed or guilty
Hindi Meaning: शर्मिंदा
89. Aspect-
English Meaning: A particular feature or part of something
Hindi Meaning: पहलू
90. Aspire-
English Meaning: To have a strong desire or ambition
Hindi Meaning: इच्छा रखना
91. Assess-
English Meaning: To evaluate or judge the value or quality of something
Hindi Meaning: मूल्यांकन करना
92. Assign-
English Meaning: To give a task or duty to someone
Hindi Meaning: नियत करना
93. Assist-
English Meaning: To help or support someone
Hindi Meaning: सहायता करना
94. Associate-
English Meaning: To connect or link things together
Hindi Meaning: संबंधित
95. Assume-
English Meaning: To take for granted or suppose
Hindi Meaning: मान लेना
96. Assure-
English Meaning: To promise or guarantee
Hindi Meaning: आश्वस्त करना
97. Astonish-
English Meaning: To surprise or amaze
Hindi Meaning: आश्चर्यचकित करना
98. Attach-
English Meaning: To connect or fasten something to another thing
Hindi Meaning: जोड़ना
99. Attack-
English Meaning: To assault or aggressively engage
Hindi Meaning: हमला करना
100. Attempt-
English Meaning: To make an effort or try to do something
Hindi Meaning: प्रयास करना
101. Attend-
English Meaning: To be present at an event or gathering
Hindi Meaning: उपस्थित होना
102. Attract-
English Meaning: To draw or pull something towards oneself
Hindi Meaning: आकर्षित
If you have any doubt, please let me know.