說一不二

to say one and mean just that (idiom); to keep one's word

to persuade

to speak / to say / to explain / to scold / to tell off / a theory (typically the last character in a compound, as in 日心說|日心说 heliocentric theory)

to speak; to talk; to say / to explain; to comment / to scold; to tell off / (bound form) theory; doctrine

one / single / a (article) / as soon as / entire; whole; all; throughout / "one" radical in Chinese characters (Kangxi radical 1) / also pr. [yao1] for greater clarity when spelling out numbers digit by digit

no; not so / (bound form) not; un-

the only (choice, way etc) / undivided (loyalty)

two / 2 / (Beijing dialect) stupid