Jōyō kanji, Taught in junior high
Stroke count: 13
Meaning: suddenly, immediately, in a hurry, arrange, stay in place, bow, kowtow
Kunyomi: にわか.に, とん.と, つまず.く, とみ.に, ぬかずく
Onyomi: トン, トツ
Composition: 屯 頁
Radical: 頁
Meaning: leaf
Reading: おおがい
Frequency: 372
頓 （トミ） sudden, abrupt, unexpected, stupid, foolish, attaining enlightenment in one effort (without ascetic practices, etc.)
頓狂 （トンキョウ） wild, freakish, madcap, crazy, hysterical
整理整頓 （セイリセイトン） keeping things tidy and in order
停頓 （テイトン） deadlock, standstill, stalemate, set-back, abeyance
頓と （とんと） completely, not at all
頓に （とみに） suddenly, all at once, rapidly