想当然耳 xiǎngdāngrán'ěr to take for granted Origin Definitions Defs Strokes Stroke Words Sentences Sents 想当然 想當然 xiǎngdāngrán to take for granted to assume that something must be so without having any factual evidence; to make subjective assumptions or conjectures耳 ěr [limitation] Literary word used at the end of a sentence to express limitation, meaning "and that is all" or "nothing more", similar to 而已 éryǐ or 罢了 bàle.