or eagre. Sharp, keen, acid; the French aigre. (Latin, crude form, acr- “acer,” sharp.)
It doth posset And curd, like eager droppings into milk.
Shakespeare: Hamlet, i. 5.
“Vex him with eager words.”
Shakespeare: Henry VI., ii. 4.
Source: Dictionary of Phrase and Fable, E. Cobham Brewer, 1894