a strong and determined person
強くて決意のある人 (tsuyokute ketsui no aru hito)
"She’s a tough cookie who never gives up easily."
"彼女はタフ クッキーで、簡単に諦めない。" (kanojo wa **tough cookie** de, kantan ni akiramenai.)
to do something risky without worrying
to eliminate something completely
the best of a group; the finest selection
to be firm and tough in negotiation
an unusually large harvest
to make a noticeable difference or impact