Abience

In psychology and ethology, the tendency or impulse to move away from or avoid something (opposite of appetence).

From Latin 'abire' (to go away, depart), from 'ab-' (away from) and 'ire' (to go). Combined with the suffix '-ence' (state or quality), it was formed as the opposite of 'appetence' (desire to approach). First used in psychological terminology in the 19th century.