sure: [14] Sure and secure are doublets – that is to say, they come from the same ultimate source, but have diverged over the centuries. Latin sēcūrus (etymologically ‘without care’) was borrowed directly into English as secure, but in Old French it evolved into sur, from which English gets sure. => secure
sure (adj.)
early 13c., "safe against attack, secure," later "firm, reliable" (c. 1300); "mentally certain, confident" (mid-14c.); "firm, strong, resolute" (c. 1400), from Old French seur, sur "safe, secure; undoubted, dependable, trustworthy" (12c.), from Latin securus "free from care, untroubled, heedless, safe" (see secure (adj.)). Pronunciation development is that of sugar (n.).
As an affirmative meaning "yes, certainly" it dates from 1803, from Middle English meanings "firmly established; having no doubt," and phrases like to be sure (1650s), sure enough (1540s), and for sure (1580s). The use as an adverb meaning "assuredly" goes back to early 14c. Sure-footed is from 1630s, literal and figurative; sure thing dates from 1836. In 16c.-17c., Suresby was an appellation for a person to be depended upon.
雙語例句
1. But legal experts are not sure if such a charge can stick.
但法律專家們不能肯定這一指控是否成立。
來自柯林斯例句
2. Be sure you get your daily quota of calcium.
要確保每天的鈣攝入量。
來自柯林斯例句
3. If something's a sure-fire hit then Radio One will play it.
如果哪首歌一定會火，那么第一頻道肯定會播出。
來自柯林斯例句
4. They want to make sure the newcomers don't get a look-in.