Wiseacre
/ˈwaɪzˌeɪkər/noun
A person who acts as if they know everything; a smart-aleck or know-it-all.
Did you know?Wiseacre is not a noble “wise” word at all: it comes from an older sense of acre meaning “to plough, act, or do,” so the insult originally targeted someone who is only acting wise, not actually wise.
Etymological Timeline
Old English
OE
ācian / ācian
“to act, do, or perform”
Middle English
ME
wiseacre
“a person who is wise or who pretends to wisdom; later, a conceited know-it-all”
16th Century
English
wiseacre
“an affectedly wise person; a coxcomb or pedant”
Modern English
English
wiseacre
“a smart-aleck; someone who speaks as if they know better than everyone else”