well enough
Synonym discussion
Sense: idiom/1
All four alternatives describe meeting a standard, but differ in register and emphasis. 'Adequately' is the closest neutral synonym and works in both speech and writing. 'Sufficiently' focuses on meeting a specific requirement or threshold, common in technical or formal contexts. 'Satisfactorily' implies the outcome meets expectations, often used in evaluation reports. 'Passably' is closest to the everyday tone of 'well enough', sometimes with a hint that the result is just barely okay. In casual conversation, 'well enough' is the most natural choice; the alternatives sound noticeably more formal.
Etymology
The phrase combines the Old English adverb 'wel' (meaning 'in a satisfactory manner') with 'genōg' (meaning 'sufficient'). Together they have been used since the early Middle English period to express an adequate or sufficient degree.
First known use
1792
1792, in the meaning defined above