按 理 àn lǐ : according to reason; in the ordinary course of events; normally

擺 事 實 講 道 理 bǎi shì shí jiǎng dào lǐ : present the facts and reason things out

不 合 理 bù hé lǐ : unreasonable

不 近 人 情 bù jìn rén qíng : not amenable to reason; unreasonable

不 可 理 喻 bù kě lǐ yù : be impervious to reason; won't listen to reason

不 像 話 bù xiàng huà : unreasonable; shocking; outrageous

道 dào : direction; way; method; road; path; principle; truth; reason; skill; method; Tao (of Taoism); a measure word; to say; to speak; to talk

Big5: , Unicode: 9053 (道),
Links: MT, Cantonese, Ld, Chinese Language

道 理 dào lǐ : reason; argument; sense; principle; basis; justification

故 gù : happening; instance; reason; cause; deceased; old

Big5: , Unicode: 6545 (故),
Links: MT, Cantonese, Ld, Chinese Language

合 理 hé lǐ : rationale; reasonable

合 情 合 理 hé qíng hé lǐ : reasonable and fair

類 推 lèi tuī : to reason by analogy

理 «理» lǐ : reason; logic; science; inner principle or structure

Big5: , Unicode: 7406 (理),
Links: MT, Cantonese, Ld, Chinese Language

理 由 lǐ yóu : reason; ground(s); justification

盭 lì : unreasonable; violent

Big5: , Unicode: 76ed (盭),
Links: MT, Cantonese, Ld, Chinese Language

論 點 lùn diǎn : argument; line of reasoning; thesis; point (of discussion)

蠻 橫 mán hèng : rude and unreasonable

叛 國 罪 pàn guó zuì : the crime of treason

順 [顺] shùn : to obey; to follow; to arrange; to make reasonable; along; favorable

Big5: , Unicode: 9806 (順),
Links: MT, Cantonese, Ld, Chinese Language

推 理 tuī lǐ : reasoning; speculative

為 此 wèi cǐ : for this reason; with regards to this; in this respect; in order to do this; to this end

為 什 麼 wèi shěn me : why; for what reason

無 理 wú lǐ : irrational; unreasonable

因 yīn : cause; reason; because

Big5: , Unicode: 56e0 (因),
Links: MT, Cantonese, Ld, Chinese Language

因 此 yīn cǐ : that is why; for that reason; therefore; for this reason

由 yóu : follow; from; it is for...to; reason; cause; because of; due to; by; to; to leave it (to sb)

Big5: , Unicode: 7531 (由),
Links: MT, Cantonese, Ld, Chinese Language

緣 [缘] «縁» yuán : along; predestined affinity; reason; edge

Big5: , Unicode: 7de3 (緣),
Links: MT, Cantonese, Ld, Chinese Language

緣 故 yuán gù : reason; cause

原 因 yuán yīn : cause; origin; root cause; reason

原 因 很 簡 單 yuán yīn hěn jiǎn diān : the reason is very simple

原 因 是 yuán yīn shì : the reason is ...

緣 由 yuán yóu : reason; cause

主 要 原 因 zhǔ yào yuán yīn : main reason; primary cause