harden up

verb

1. intr nautical to tighten the sheets of a sailing vessel so as to prevent luffing

Example Sentences

You're using a different set of muscles when you walk; until they harden up, you'll have some assorted Charley horses.

From Project Gutenberg

I've seen lots of young fellows harden up—some of 'em just as green an' useless when they came as you are now.

From Project Gutenberg

These should harden up on the outside, and make a delicious confection.

From Project Gutenberg

Must harden up first in the sea; and then, please the gods, Ill climb with you.

From Project Gutenberg

But I spozed that her brain would harden up on this subject when she got more familiar with it––they generally do.

From Project Gutenberg