Past tense of freshen; made fresh, renewed, or more lively; or (nautical) increased in force (describing wind or weather).
From freshen (to make fresh) + -ed past tense suffix. Freshen comes from fresh + -en, a suffix that creates verbs from adjectives.
The nautical use of 'freshened' (as in 'the wind freshened') shows how English captures the feeling of sudden revitalization—the same metaphor works whether you're describing a breeze, a drink, or a person's mood.
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