In Zen buddhism we are often in contact with the mondous (read as mondo, with a long ending o). A mondou is a Japanese word standing for a dialogue, or rather a rapid-fire question and answer session, that tries to push the student closer to enlightenment (nirvana, <span lang="ja">涅槃</span> - nehan). Mondou in kanji is <span lang="ja">問答</span> (<span lang="ja">もんどう</span>). One can easily see mon (<span lang="ja">問</span>) from problem/question and kotae (<span lang="ja">答</span>), read in this case as dou, which is solution/answer.