A: Have you watched the new “Mission Impossible” movie?

B: Not yet. Have you?

A: Yes. With Tom Cruise’ appeal and a thrilling plotline, the movie is a surefire hit with the general public.

Note: This word means “certain to get successful or expected results.” Appearing as early as in the 1800s, this American usage alludes to rifles. Since early rifles were rather less than completely reliable, a “surefire” rifle would be highly regarded.