
English word enough comes from Middle English y-, Proto-Germanic *ga-, Proto-Germanic *nōgaz, and later Proto-Germanic *ganōgaz (Enough, sufficient.)
y- (Middle English)
Used with past participle conjugations to form past participles (this prefix does not occur independently).
*ga- (Proto-Germanic)
Indicates association or togetherness; co-.. Indicates completeness or wholeness. In verbs, also indicates perfectivity (a finished action).
*nōgaz (Proto-Germanic)
*ganōgaz (Proto-Germanic)
Enough, sufficient.
nóg (Old Norse)
ġenōg (Old English)
genog (Old English)
Sufficient; enough.
inow (Middle English)
enough (English)
Sufficient; all that is required, needed, or appropriate. Stop! Don't do that anymore, etc. Fully; quite; used to express slight augmentation of the positive degree, and sometimes equivalent to very.. Sufficiently. A sufficient or adequate number, amount, etc.