toughie
/ˈtʌfi/
noun
- A difficult problem, question, or situation.
- This math puzzle is a toughie; I've been stuck on it for an hour.
- Deciding which job offer to accept is a toughie.
- The last question on the test was a real toughie.
- A person who is strong, determined, or not easily defeated.
- Don't underestimate him—he's a little toughie on the soccer field.
- The old boxer was a toughie, still sparring at age seventy.
- She's a toughie who never gives up, no matter the challenge.