make a counterattack and return like for like, especially evil for evil; "The Empire strikes back"; "The Giants struck back and won the opener"; "The Israeli army retaliated for the Hamas bombing"
the ability to respond to affective changes in your interpersonal environment
the ability to respond to physical stimuli or to register small physical amounts or differences; "a galvanometer of extreme sensitivity"; "the sensitiveness of Mimosa leaves does not depend on a change of growth"
(physiology) responsiveness to external stimuli; the faculty of sensation; "sensitivity to pain"
sensitivity to emotional feelings (of self and others)