Definitions from Wiktionary (harden up)

▸ verb:  (nautical, UK) To tighten up a sailboat's sheets in order to prevent luffing.
▸ verb:  (informal, transitive) To become or make (something, someone) hard, either literally or figuratively.


▸ Words similar to harden up
▸ Usage examples for harden up

▸ Idioms related to harden up
▸ Wikipedia articles (New!)
▸ Words that often appear near harden up
▸ Rhymes of harden up

▸ Invented words related to harden up