once in lifetime (adjective) only: singular
Sinonime: abash, blow out, blow up,
chill,
cripple,
damp, dampen,
daunt,
debilitate, deject, disarrange,
disconcert, discountenance,
discourage,
dishearten,
disorder, disorganize,
disparage, dispirit,
disturb,
embarrass, enfeeble, get to,
jumble,
muddle, nonplus, psych out,
rattle,
sap, send up,
shake,
snarl, take apart, take steam out,
undermine, unglue, unman, unsettle, unzip,
upset,
weakenAntonime: boost,
comfort,
encourage,
uplift