1. Abhorrent (adj.) 1610s, "recoiling (from), strongly opposed to," from Latin abhorentem (nominative abhorrens) "incongruous, inappropriate," present participle of abhorrere "shrink back from, be remote from, be out of harmony with" (see abhor)

2. The Latin ancestor of Abhorrence isn't all that different from today's word or its meaning — it comes from abhorrēre, which means "to shrink back from," and it became synonymous with loathing in the early 17th century

3. Abhorrent (adj.) 1610s, "recoiling (from), strongly opposed to," from Latin abhorentem (nominative Abhorrens) "incongruous, inappropriate," present participle of abhorrere "shrink back from, be remote from, be out of harmony with" (see abhor).Meaning "repugnant, loathesome" is from 1650s

4. 1400, "to loathe, regard with repugnance, dislike intensely," literally "to shrink back with horror or dread," from Latin Abhorrere "shrink back from, have an aversion for, shudder at," from ab "off, away from" (see ab-) + horrere "tremble at, shudder," literally "to bristle, be shaggy," from PIE *ghers-"start out, stand out, rise to a point, bristle" (see horror).