adverse

the word 'adverse' originates from the latin 'adversus', the past participle of 'advertere', meaning 'to turn toward'. this literal sense of turning toward something evolved to imply opposition, as turning toward an opponent in battle. the core root 'vertere' (to turn) is of proto-indo-european origin, seen in many words relating to change and direction. through latin, the combined form 'adversus' came to signify a hostile or unfavorable position facing someone, a meaning retained in modern english.

Structure: ad (towards) + verse (to turn) ad- (prefix, latin origin, meaning 'to, towards'); verse (root, latin origin, from 'vertere', meaning 'to turn').