dotage

n (idm 习语) in one's dotage confused in one's mind because of old age 年老昏聩.

dopey (also dopy), Doric, dorm, dormancy, dormant, dormer, dormitory, dormitory town, dormouse, dorsal, dory, DOS, dosage, dose, doss, doss-house, dosser, dossier, dot, dot matrix, dote, doting, dotingly, dotted line, dottiness, dottle, dotty, double, double agent, double back, double bed, double bill, double bind, double bluff, double chin, double cream, double date, double Dutch, double entendre, double entry,