impertinent; presumptuous; know-it-all
Describes someone who acts clever or knowledgeable in an annoying, presumptuous way; often used for a person who gives unwanted advice or opinions. Slightly old-fashioned but still understood.
His know-it-all attitude is irritating.
Don't butt in with your presumptuous opinions.
Standard kanji spelling; the reading さかしら is the only reading given.
Kana spelling is common in modern writing, especially when the kanji is considered difficult or old-fashioned.
Derived from 賢し (sakashi, 'clever') + suffix ら (expressing a state or manner). The exact historical development is uncertain, but it has been used since classical Japanese to describe presumptuous cleverness.