insure: [15] Insure and ensure [14] are ultimately the same word. And their common ancestor started out, in fact, as a variant of assure [14]. This came via Old French asseurer from Vulgar Latin *assēcūrāre, a compound verb formed from the Latin prefix ad- ‘to’ and the adjective sēcūrus ‘safe’ (source of English secure and sure).
Anglo-Norman had a variant form, enseurer, which produced English ensure. From fairly early on this had been alternatively spelled insure (using the Latinate prefix in-), but it was not until the 17th century that this version became established in the sense ‘provide cover against loss, damage, etc’ (for which previously the more usual term had actually been assure). => assure, ensure, secure, sure
insure (v.)
mid-15c., insuren, spelling variant of ensuren (see ensure). Took on its particular sense of "make safe against loss by payment of premiums" from mid-17c. (replacing assure in that meaning). Related: Insured; insuring.
雙語例句
1. "One thing you can never insure against is corruption among your staff."—"Agreed."
“永遠也防不勝防的就是員工內部的貪污腐敗?！薄巴??！?/dd>
來自柯林斯例句
2. Think carefully before you insure against accident, sickness and redundancy.