word, at a
without more ado, at once, forthwith
JC I.ii.265[Casca to Brutus, of Caesar] if I would not have taken him at a word, I would I might go to hell among the rogues
MW I.iii.14[Host to Bardolph] I am at a word [i.e. no sooner said than done]
SHAKESPEARE'S WORDS © 2020 DAVID CRYSTAL & BEN CRYSTAL