merc (noun) mercenary: person who fights, kills for money
Sinonime: anxious,
critical, excitable,
excited, high-strung, ill at ease, impatient,
irascible,
irritable, keyed up, overstrung, restive, restless, skittish, tense,
touchy,
uneasy,
uptightAntonime: calm,
composed, easy-going,
laid-back