Meaning

noun a kind of pain such as that caused by a wound or a burn or a sore

verb be the source of pain

adjective showing mental alertness and calculation and resourcefulness

originFrom Middle English smert, smart, from Old English smeart (“smarting, smart, painful”), from Proto-West Germanic *smart, from Proto-Germanic *smartaz (“hurting, aching”), from Proto-Indo-European *(s)merd- (“to bite, sting”). Cognate with Scots smert (“painful, smart”), Old Frisian smert (“sharp, painful”).

Etymology from Wiktionary, CC BY-SA 3.0