Where does “a-” come from?

a- (English) comes from Old English ġe-, from Proto-West Germanic ga-, from Proto-Germanic ga-, from Proto-Indo-European ḱóm, from Proto-Indo-European ḱe, from Middle English kyt, from German kitt, from Old High German kuti — to bend; curve; arch; vault; to bow, bend, arch,...

Ancestry of “a-”, step by step

StepLanguageWordMeaning
1Old Englishġe-used as an intensifier for verbs, indicating completeness or perfection
2Proto-West Germanicga-used as an intensifier for verbs, indicating...
3Proto-Germanicga-Indicates association or togetherness; co-;...
4Proto-Indo-Europeanḱómbeside, near, by, with
5Proto-Indo-EuropeanḱeDeictic particle, here; Post-positional...
6Middle Englishkyt
7Germankittputty certain kinds of cement used for fixing e.g. window panes
8Old High Germankuti
9Proto-West Germanickwidugum, resin
10Proto-Germanickweduzresin
11Proto-Indo-Europeangʷet-resin, gum; to say, speak
12Proto-Indo-Europeangū-to bend; curve; arch; vault; to bow, bend, arch,...

Words derived from “a-

Every word from Proto-Indo-European gū-
a- — Etymology, Origin & Word History | Etymology Explorer