(v1,vi) (1) to play dumb
to feign ignorance
to play innocent
to have a blank facial expression
(2) to play the fool
(3) to be in one's dotage
(P)
(v1,vi) (1) to grow senile
to be childish with age
(2) to be mentally slow
to be befuddled
(3) to become engrossed (in something)
(v1,vi) (1) to grow senile
to be childish with age
(2) to be mentally slow
to be befuddled
(P)
(v1,vi) to feign ignorance
(v1,vi) (uk) to look old
to become musty
to wear out
(v1,vi) to be half asleep
to be still only half awake
(v1) to wait in vain
(v1) to wait in vain