The surest sign of this crisis is the jovial conviction that there is no crisis.
The club had healthy profits and was generating a good amount of cash—one of the surest measures of a well-managed business.
The surest sign of the star's implosion: he's become best friends with baseball has-been Lenny Dykstra.
Learning from history is, after all, the surest way to form a more perfect union.
In this economy, a higher education is the surest route to the middle class.
There are other ways of reaching the same end; what I give you is the surest.
If you do not wish for the flower, the surest way is not to sow the seed.
See how the composers who have been the most original have been the ones who have laid the surest foundation for permanent fame.
Untrammelled, instructive speech he accounts the surest weapon.
And yet, even the rise of the bankers is not the only or the surest indication that centralization is culminating.
c.1300, "safe, secure," later "mentally certain" (mid-15c.), from Old French sur, seur "safe, secure," from Latin securus "free from care, untroubled, heedless, safe" (see secure (adj.)). Pronunciation development followed that of sugar. 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 a qualifier meaning "assuredly" goes back to early 15c. Sure-footed is from 1630s; sure thing dates from 1836. In 16c.-17c., Suresby was an appellation for a person to be depended upon.
Yes; certainly: Sure, I'll support you (1842+)