adj.tending to repel or dissuade

"aversive conditioning"

Personal control over aversive stimuli and its relationship to stress.
Dopamine in motivational control: rewarding, aversive, and alerting.
Negative affectivity: The disposition to experience aversive emotional states
Negative affectivity: the disposition to experience aversive emotional states.
The endogenous cannabinoid system controls extinction of aversive memories.
Amygdala activity related to enhanced memory for pleasant and aversive stimuli
Have We Underestimated the Human Capacity to Thrive After Extremely Aversive Events?
Uniform inhibition of dopamine neurons in the ventral tegmental area by aversive stimuli
Preferential activation of midbrain dopamine neurons by appetitive rather than aversive stimuli.
Loss, trauma, and human resilience: have we underestimated the human capacity to thrive after extremely aversive events?