Stale, processed are opposite words to fresh
fresh
Cynical.
aged or aging
rotten
For "fresh" (bright, clean), the opposite could be dark, dirty, or grubby.For "fresh" (new), antonyms include old, or used.For "fresh" (original), the opposites could be unoriginal, hackneyed, or trite.For "fresh" (rested) the opposite could be tired, or fatigued.For food, the opposite could be stale or spoiled. For the condition in which food is obtained, the opposite of freshcould be canned, or preserved.
Fresh
fresh
Fresh, refreshed
fresh, ripe, unspoiled, untarnished, clean.
The opposite of stale (food, air) would be fresh. The opposite of stale (tired, cliche) would be new, or original.
The opposite of trite (cliche, overused, stale) would be fresh, original, innovative, or unique.
Opposites of hackneyed are new, fresh, original...