divergence (n.)

"act or state of moving or pointing in opposite directions," 1650s, from Modern Latin divergentia, from divergens, present participle of divergere "go in different directions," from assimilated form of dis- "apart" (see dis-) + vergere "to bend, turn, tend toward" (from PIE root *wer- (2) "to turn, bend"). Figurative sense of "departure from a course or standard" is from 19c.  Related: Divergency.