• 愚ぐ

  foolishness, silliness, stupidity, folly

• 愚かおろか

  foolish, stupid, silly

• 愚痴ぐち

  idle complaint, grumble

• 愚連隊ぐれんたい

  gang of young toughs, hooligans, hoodlums, hoods, yobbos

• 愚図愚図ぐずぐず

  slowly, tardily, dawdling, lingering, hesitantly

• 愚妻ぐさい

  wife

• 愚生ぐせい

  I, me

• 愚禿ぐとく

  I, me

• 愚昧ぐまい

  stupid

• 愚物ぐぶつ

  fool

• 愚息ぐそく

  (one's) son

• 愚人ぐじん

  fool, idiot

• 愚母ぐぼ

  one's mother

• 愚父ぐふ

  (one's) father

• 愚姉ぐし

  older sister

• 愚妹ぐまい

  younger sister

• 愚蒙ぐもう

  stupid, foolish

• 愚民ぐみん

  ignorant people

• 愚行ぐこう

  foolish act, folly

• 愚意ぐい

  (one's) humble opinion

• 愚弱ぐじゃく

  stupid and weak

• 愚挙ぐきょ

  foolish undertaking

• 愚見ぐけん

  (one's) humble opinion

• 愚僧ぐそう

  silly monk, foolish monk

• 愚夫ぐふ

  foolish man

• 愚図ぐず

  dullard, indecisive person

• 愚論ぐろん

  foolish argument or view

• 愚兄ぐけい

  (one's) older brother

• 愚弄ぐろう

  mockery, derision, ridicule

• 愚者ぐしゃ

  fool, nitwit

• 愚答ぐとう

  foolish answer, stupid answer

• 愚問ぐもん

  foolish question, stupid question

• 愚弟ぐてい

  (one's) younger brother

• 愚考ぐこう

  foolish thought

• 愚劣ぐれつ

  foolishness, stupidity, silliness

• 愚女ぐじょ

  (one's) daughter

• 愚直ぐちょく

  simple honesty, tactless frankness

• 愚作ぐさく

  poor piece of work, rubbish

• 愚才ぐさい

  (one's own) abilities and intelligence

• 愚案ぐあん

  foolish idea

• 愚鈍ぐどん

  stupid, dim-witted, dense, dull, obtuse, slow

• 愚計ぐけい

  foolish plan

• 愚書ぐしょ

  stupid book, worthless book

• 愚説ぐせつ

  foolish opinion, idiotic view

• 愚策ぐさく

  stupid plan, inane way of doing something

• 愚形ぐけい

  shape which accepts few winning tiles, inefficient tile pattern

• 愚公ぐこう

  Yu Gong (main character in the 4th century BC Chinese fable "The Foolish Old Man Removes the Mountains"), Yúgōng, Yukong

• 下愚かぐ

  very stupid (person), great fool

• 迂愚うぐ

  stupid, ignorant

• 暗愚あんぐ

  foolish, imbecile, feebleminded