n.
Function: intransitive verb
Etymology: Middle English smerten, from Old English smeortan; akin to Old High German smerzan to pain
Date: 13th century
1 : to cause or be the cause or seat of a sharp stinging pain also : to feel or have such a pain
2 a : to feel or endure distress, remorse, or embarrassment < smart ing from wounded vanity ― W. L. Shirer> b : to pay a heavy or stinging penalty <would have to smart for this foolishness>