PIE*gleibh,cut,cleaveから、語源的にはcleft,glyphと同じ。 さらにPIE*skel,cut,cleaveから、語源的にはskill,scaleと同じ。 派生語義はdiscerning,clever。PIE*skeiの「切る、裂く」に由来するscienceと比較する。
This is a low word, scarcely ever used but in burlesque or conversation; and applied to any thing a man likes, without a settled meaning. [Johnson, 1755]The meaning has narrowed since, but clever also often in old use and dialect meant "well-shaped, attractive-looking" and in 19c. American English sometimes "good-natured, agreeable." Related: Cleverly; cleverness.