from Wiktionary, Creative Commons Attribution/Share-Alike License
- A prefix of Anglo-Saxon origin, the same as on-.
- A prefix of Anglo-Saxon origin, a reduced form of and-.
- not; used to make words that have a sense opposite to the word (or stem) to which the prefix is attached. Used with stems that begin with vowels and "h".
From Middle English an-, from Old English an-, on- ("on-"), from Proto-Germanic *ana (“on”). More at on. (Wiktionary)
From Middle English an-, and-, from Old English and-, ond- ("and-, back, against"). More at and-. (Wiktionary)
From Ancient Greek ἀν- (an-). (Wiktionary)