This word is acceptable for play in the US & UK dictionaries that are being used in the following games:

• Lexulous
• Wordscraper
• Wordosaur

verb-intransitive. To become fresh, as in vigor or appearance: freshened up after the day's work.

verb-intransitive. To become brisk; increase in strength. Used of the wind.

verb-intransitive. To lose saltiness.

verb-intransitive. To calve and therefore begin to produce milk. Used of a cow.

v. To make fresh.

v. To add to or strengthen (a drink).

v. To become fresh.

v. To make fresh.

v. To begin or resume giving milk, especially after calving.

v. To make fresh; to separate, as water, from saline ingredients; to make less salty.

v. To refresh; to revive.

v. To relieve, as a rope, by change of place where friction wears it; or to renew, as the material used to prevent chafing.

verb-intransitive. To grow fresh; to lose saltness.

verb-intransitive. To grow brisk or strong.

To grow brisk; grow stronger or brighter: as, the wind freshens; the verdure freshens.

To grow fresh; lose salt or saltness.

To refresh; revive; renew.

To make fresh; remove saltness from: as, to freshen fish or flesh.

Nautical, to relieve, as a rope, by altering the position of a part exposed to friction.

In surgery, to denude (a part) of its tegument so as to form a raw surface which will readily unite with a similar surface when the two are brought into apposition.

v. become or make oneself fresh again

v. make (to feel) fresh

v. make fresh again

"Sometimes it's added not to cover flaws, but just to "freshen" the design and increase sales."

freshened    freshening    freshens   

change    modify    alter   

to freshen ballast    fresnel-arago law    fresnel's biprism    to freshen the hawse   

refresh    revive    liven    renew    brighten    quicken    brisk    brisken   

Hessian    accession    aggression    compression    concession    confession    decompression    depression    digression    discretion