In a manner that opposes, reduces, or resists aggression.
Derived from 'antiaggressive' plus the adverbial suffix '-ly', which converts adjectives to adverbs describing how something happens. Appeared in 20th-century behavioral and medical writing.
Adverbs like this show how English lets us describe not just what we do, but how we do it—'he responded antiaggressively' tells us about his method, not just his action.
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