freshen Definition

1. To make something fresh or fresher.

Thesaurus: clean, cleanse, purify, ventilate, air, spruce up.
tr & intr
2. To get washed and tidy; to wash and tidy (oneself or someone).

Form: freshen up (also)
Form: freshen oneself up
Form: freshen someone up
intr
3. Said of a wind: to become stronger.