(a.) Easily stirred up or stimulated; high-strung\; capable of being excited, or roused into action; susceptible of excitement.

agitable all nerves apprehensive bearish bitchy cankered cantankerous churlish combustible crabbed cranky cross cross-grained crusty cussed disagreeable edgy emotional emotionally unstable eruptive explosive fearful feisty feverish fidgety fractious frightened high-mettled high-spirited high-strung highly emotional hot-blooded huffish huffy hysterical inflammable irascible irritable jumpy mean mercurial mettlesome nerves on edge nervous nervy on edge ornery overstrung panicky perturbable perverse prickly quick-tempered restive restless sensitive skittery skittish snappish spiteful spleeny splenetic startlish temperamental testy touchy ugly uneasy unstable volatile volcanic waspish