A

1. Abyss – From Abyssos, (bottomless)
2. Academy – From ‘Akademia’, Plato’s school of philosophy.
3. Acoustic – From ‘akoustikos’, pertaining to hearing.
4. Acrobatics – From ‘akro’ meaning high, and bainein “to walk”
5. Acromegaly – From ‘akro’ meaning ‘tip’ and ‘megalos’ meaning ‘large’
6. Acronym – From “akros,” meaning “topmost” or “extreme,” and “onym,” from “onoma,” meaning “name.
7. Acrophobia – From ‘Akro” meaning high and phobia (fear)
8. Acropolis – From “Akro” meaning high and polis (city)
9. Aerial – From ‘aeras” meaning (air)
10. Aerodynamic – From ‘Aeras’ (air) and ‘dynami’ (power)
11. Aesthetics – From Aisthitikos (sensitive or perspective)
12. Agape – From Agape (love)
13. Agony – From agonia
14. Agora – From Agora
15. Agoraphobia – From “agora’ meaning assembly and ‘phobia’ fear
16. Air – From ‘aeras”
17. Algorithm – From ‘arithmos’, meaning number.
18. Ambrosia – From ‘a-‘ and brotos (mortal)
19. Ammonia – From Ammon the Egyptian God
20. Amnesty – A- (non) and mnaisthai (to remember)
21. Amphibious – From ‘amphibios’ meaning leaving two lifes
22. Amphitheatre – From Amfitheatron
23. Amphora – From amphi- (both) and ferein (to carry)
24. Anaemia – From ‘anaimia’, lack of blood.
25. Anaesthesia – From ‘an’ (without) and ‘aisthesis’ (sensation).
26. Anagram – From ana- and gramma (letter)
27. Anachronism – From ana- and chronos (time)
28. Analogy – From ‘analogia’, proportion.
29. Analysis – From ‘analysis’, meaning the untie
30. Anaphora – From ‘anaphora’ (reference)
31. Anarchy – From ‘anarchia’, without a ruler.
32. Anathema – From anathema (excommunication)
33. Anatomy – From ‘anatome’, dissection.
34. Android – From “andras”, male.
35. Anecdotal – From anekdotos (unpublished)
36. Angel – From ‘aggelos’ messenger
37. Angiology – From ‘angeion’ (vessel) and ‘logia’ (study of).
38. Anomaly – From anomalia unevenness
39. Antagonist – From ‘antagonistes” meaning opponents, rivals etc
40. Anthem – From antiphonon
41. Anthology – From ‘anthos’ (flower) and ‘legein’ (to gather).
42. Anthropology – From ‘anthropos’ (human) and ‘logia’.
43. Antibiotic – From ‘anti’ (against) and ‘bios’ (life).
44. Antidote – From ‘anti’ and ‘didonai’ to give.
45. Antithesis – From ‘anti’ (against) and ‘thesis” (place).
46. Anxiety – From agkho (to choke)
47. Aphasia – From afasia
48. Aphorism – From aphorismos (to delimit)
49. Apocalypse – From ‘apokalupsis’, revelation.
50. Apocrypha – From ‘apokryphos’, hidden.
51. Apology – From ‘apologia’ (confession)
52. Apostrophe – From ‘apostrephein’, turning away.
53. Apothecary – From ‘apotheke” , storehouse
54. Arachnophobia – From ‘arachne’ (spider) and phobia( fear)
55. Archaeology – From ‘archaios’, ancient.
56. Archetype – From ‘archetypo’
57. Achipelago – From ‘arche” chief and pelagos (sea)
58. Architecture – From ‘arkhitekton’, master builder.
59. Archive – From αρχείο (archive)
60. Arithmetic – From ‘arithmos’, number.
61. Article – From ‘άρθρο’
62. Aroma – from ‘aroma” (scent)
63. Aseptic – From ‘a’ (without) and ‘septicos’ (putrefactive).
64. Asterisk – From ‘asteriskos’, little star.
65. Astigmatism – From ‘a’ (without) and ‘stigma’ (point).
66. Astraphobia – From ‘astrapē’ (lightning) and ‘phobia’ (fear).
67. Astrology – From ‘astron’, star and logos (study)
68. Astronaut – From ‘astron’, star and ‘nautes” (sailor)
69. Astronomy – From ‘astron’, star and nomos (law)
70. Astrophysics – From ‘astron’ star and physika (nature)
71. Asylum – From asylon
72. Asymmetry – From ‘a’ (without) and ‘symmetria’ (symmetry).
73. Asynchronous – From ‘a’ (without) and synchronos (same time).
74. Asthma – From ‘asthma’, panting.
75. Atheism – From ‘atheos’, without god.
76. Atlas – From Atlas
77. Atmosphere – From ‘atmos’, vapor.
78. Atom – From “atomos” indivisible
79. Autarchy – From ‘autarkhia’, self-sufficiency.
80. Authentic – From ‘authentikos’, original
81. Autobiography – From ‘autos’, self.
82. Autocrat -From autokratoras
83. Autodidact – From “autos” (self), didact didasko (to teach)
84. Automatic – From “automatos”
85. Automobile – From ‘autos’ and ‘mobilis’, movable.
86. Autonomy – From ‘autonomia’, self-law.
87. Autopsy – “auto” meaning “self” and “opsis” meaning “sight,”
88. Axial – From ‘axios’, worth.
89. Axiom – From ‘axioma’, that which is thought fitting.
90. Axis – From ‘axōn’, axle.
91. Axon – From ‘axōn’, axis.
92. Azoic – From ‘a’ (without) and ‘zoē’ (life).
93. Azotemia – From ‘azote’ (nitrogen) and ‘haima’ (blood).