Adjektive
nervous {feelings & emotions}, [ more nervous ; most nervous ]
erratic [ more erratic ; most erratic ]
jumpy [ jumpier ; jumpiest]
irritable [ more irritable ; most irritable ]
jittery {feelings & emotions}
spooky {feelings & emotions}, [ spookier ; spookiest]
intemperate [ more intemperate ; most intemperate ]
itchy [ itchier ; itchiest]