おたんちん

(1)slow to learn or understand; lacking intellectual acuity; "so dense he never understands anything I say to him"; "never met anyone quite so dim"; "although dull at classical learning, at mathematics he was uncommonly quick"- Thackeray; "dumb officials make some really dumb decisions"; "he was either normally stupid or being deliberately obtuse"; "worked with the slow students"

(2)学ぶ、あるいは理解するのが遅い

(3)知的な鋭敏さが不足すること

(4)(used informally) stupid

(5)愚かな

(6)devoid of good sense or judgment; "foolish remarks"; "a foolish decision"

(7)良識か判断力に欠けている

(1)