sure of oneself
Self-confident, as in Now that Mary's graduated she's much more sure of herself. This expression uses sure in the sense of “confident” or “secure,” a usage dating from the mid-1400s.
What’s The Difference Between Cussing, Swearing, And Cursing?It’s probably safe to assume that as long as humans have been speaking, we’ve been cussing and cursing. What can the connection between “curse,” “swear,” “cuss” and “profanity” tell us about all the words we aren’t supposed to say, yet say with great frequency? Cursing vs. cussing Placing a curse obviously isn’t the same as uttering curse words, but both concepts start with the Christian Church. …
The American Heritage® Idioms Dictionary Copyright © 2002, 2001, 1995 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company.