the mind > mental capacity > knowledge > conformity with what is known, truth > deceit, deception, trickery > dissimulation, pretence > pretend, dissemble [phrase] > specific illness (2)
colloquial. to have a bone in one's leg (also arm)and variants: used as an obviously spurious excuse for not doing something or as an example of a…
slang (originally U.S.) to play (also †act) possum: to feign, dissemble; esp. to pretend to be ill or dead (in allusion to the opossum's supposed…