Negative adverb used before verbs, adjectives, and other adverbs to indicate negation; also used as a bound-form prefix to form terms with opposite meanings

(literary) in a very short time; the time of a turn on one's heel

Negative adverb used before verbs, adjectives, and other adverbs to indicate negation; also used as a bound-form prefix to form terms with opposite meanings

(literary) to shrink back in fear; to retreat (often used in the negative to mean undaunted)