up phrasal [verb] [I or M]Would you like to freshen up (= make yourself clean) after your journey? [I]I'm just going to have a shower to freshen myself up (= make myself clean). [T]The towels aren't really dirty, but I'm going to give them a quick wash to freshen them up (= make them pleasant). [M]We're going to paint the kitchen to freshen it up (= make it look cleaner and brighter) a bit. [M]
FRESHEN
Meaning of FRESHEN in English
Cambridge English vocab. Кембриджский английский словарь. 2012