1. Etymology of the Greek prefix a- (ἀ-)

Derivations in Greek

aikes, akarpos, agnosia, agonos, aphasia, aphonia, aphullos, apnoia, apous, arrhuthmia, azugos, alastos, akinesia, apathes, adutos, akonitos, achromatos, akephalos, akedeia, aoristos, akatalektikos, akapnos, athinganos, agamos, apteros, apraxia, asbestos, aphanes, arruthmos, asphuxia, amorphos, atrophos, atopos, atonos, amiantos, ataxia, asundetos, asulos, agalaxia, abussos, ablepsia, aboulia, akamatos, akardios, akedia, akoimetos, adesmos, adespotos, adiaphoria, adiaphoros, aedes, agluphos, aglossos, alusson, amarantos, anomos, apepsia, apurexia, apuretos, apleuros, apolis, aponia, aprosexia, aschistos, asebeia, asphaltos, asummetria, asunartetos, astheneia, astomos, ataraxia, ateles, atemeles, atimia, atomos, atropos, azumos, apurenos, atheos, asplenon, ametabolos, alogos, asumptotos, amethustos, amnesia, amnestia, apuros, aplanetos, askios, adiabatos

Derivations in other languages

English a-, English achlamydeous, English ahemeral, English axenic, French asyllabie, French apatride, French adynamie, French aplasie, French atéliose, French anéroïde, French azote, Italian ametria, Latin Achlaena, Latin achenium, Latin Acalyptera, Latin Acoela, Latin Achoriati, Latin Acotylea, Latin Acrania, Latin Amyda, Latin Amyris, Latin amixia, Latin Aplacentalia, Latin Aporidea, Latin aptychus, Latin Astilbe, Latin Atylax, Latin Athyrium, Latin Achaeta, Latin atrichus, Latin Acrasis, Latin Aglycia, Latin Alophochloa, Latin Apera, Latin Apogonia, Latin Astrebla, Latin Ataxia, Latin Atropis, Latin Podionapus, Latin acamptoclada, Latin anelythra, Latin apetala, Latin aphylla, Latin apterus, Latin astilbe

2. Etymology of the Greek word a- ((ἀ-))

Derivations in Greek

abiotos, amiantos, amnesia, amorphos, atonos, amethystos