intelligent, clever
high intelligence quotient (IQ)
know better, have an excellent brain
play clever tricks
be able to have a proper appraisal off oneself
rational, sensible
sensible, wise
quick, fast
quick, sharp
clever, smart
quick-witted, resourceful
nimble, agile
sensitive, susceptible
suit one’s actions to changing conditions
stupid, clumsy
stupid, foolish
~症dementia || 老年~ senile dementia
stupid
retarded, mentally deficient
foolish-looking, muddleheaded
clumsy, awkward
stupid-looking
inconsiderate
feel giddy, lose one’s head
muddled, confused
blind
muddle-headed, mixed up
clever all one’s life but stupid this once