Debile

"So, then, it was no surprise to the ranchhold when the buckboard spun to the door, and Raidler took up his debile protégé like a handful of rags and set him down upon the gallery."

"Being a little debile and unclear of mind he did not realize the risks he was running by passing all his nights in the same bed as the daughter, while he himself was suffering continually from a dammed-up sexual drive."

"A very important group of the mentally abnormal, the oligophrenes, who — according to the degree of lack of intelligence — are called idiots, imbeciles, or debiles, are inter alia also predisposed to misbehaviour because they lack the ability to understand what to do in a situation demanding action."