Definition of freshens:
(v) :
(intransitive) To become fresh.
(v) :
To be refreshed.
(v) :
To become cool.
(v) :
To become not salty, to lose its salinity. (of water)
(v) :
(intransitive, of wind) To become stronger.
(v) :
(intransitive, transitive, of a cow) To begin or resume giving milk, especially after calving; to cause to resume giving milk.