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% replaces any number of letters (la% - lake, lamp)_ replaces one letter (ca_ - car, cat)

Crossword clues for 26-Across's opposite 3 letters:

HER: 26-Across's opposite
ARBOREOUS: Opposite of 26 Across.
MELTDOWN: Opposite of 26-Across?
THIS: 26-Across's opposite