Dearbh: Cànan: Ἑλληνιστί Gram: [prefix]	Fios: From Proto-Hellenic *ə-, from Proto-Indo-European *n̥-. The form ἀν- (an-) appears when followed by a laryngeal and a vowel: that is, in an open syllable of the n̥HV- form. --Wikt IPA: /a/ → /a/ → /a/
Gluas: (the alpha privativum, used to make words that have a sense opposite to the word (or stem) to which the prefix is attached. It is also known as privative a and alpha privative)
Cruthaichte:  2018-10-31 le 1991-cpd

Litreachaidhean eile

• ἀν- (before vowels)
• νᾱ- (when followed by the PIE laryngeal *h₂ and a consonant - i.e. *n̥h₂C-)
• νω- (when followed by the PIE laryngeal *h₃ and a consonant - i.e. *n̥h₃C-)
• νη- (when followed by the laryngeal *h₁ and a consonant - i.e. *n̥h₁C-)