Broaden
来自Big Physics
Safin（讨论 | 贡献）2022年4月27日 (三) 10:23的版本 （建立内容为“Category:etymology == wiktionary == [https://en.wiktionary.org/wiki/broaden ref] From broad + -en(verbal suffix). == etymonline == [https://www.etymo…”的新页面）
wiktionary
From broad + -en(verbal suffix).
etymonline
broaden (v.)
1726, "make broad;" 1727, "grow broad;" from broad (adj.) + -en (1). The word seems no older than this (it was cited by Johnson in one of James Thomson's "Seasons" poems); broadened also is first found in the same poet. Broadening is recorded from 1835 as a noun, 1850 as a present-participle adjective.
