Be foolish or senile due to old age.

Roget 499: to be an imbecile etc. adj.; have no brains, have no sense etc. 498.    trifle, drivel, radoter^†, dote; ramble etc. (madness) 503; play the fool, play the monkey, monkey around, fool around; take leave of one's senses (insanity) 503; not see an inch beyond one's nose; stultify oneself etc. 699; talk nonsense etc. 497.    ... show more

Roget 503: be insane etc. adj.. become insane etc. adj.; lose one's senses, lose one's reason, lose one's faculties, lose one's wits; go mad, run mad, lose one's marbles [Coll.], go crazy, go bonkers [Coll.], flip one's wig [Coll.], flip one's lid [Coll.], flip out [Coll.], flip one's bush [Coll.].    rave, dote, ramble, wander; drivel etc. (be imbecile) 499; have a screw loose etc. n., have a devil; avoir le diable au corps [Fr.]; lose one's head etc. (be uncertain) 475.    render mad, drive mad etc. adj.; madden, dementate^†, addle the wits, addle the brain, derange the head, infatuate, befool^†; turn the brain, turn one's head; drive one nuts [Coll.].    ... show more

Dutch: dol zijn op, dollen, versimpelen

Shower with love; show excessive affection for.