- shallow (adj.)
[shallow 词源字典]
- c. 1400, schalowe "not deep," probably from or related to Old English sceald (see shoal (n.)). Of breathing, attested from 1875; of thought or feeling, "superficial," first recorded 1580s. The noun, usually shallows, is first recorded 1570s, from the adjective.[shallow etymology, shallow origin, 英语词源]