有理

reasonable / justified / right / (math.) rational

to have; there is / (bound form) having; with; -ful; -ed; -al (as in 有意[you3 yi4] intentional)

texture / grain (of wood) / inner essence / intrinsic order / reason / logic / truth / science / natural science (esp. physics) / to manage / to pay attention to / to run (affairs) / to handle / to put in order / to tidy up

(idiom) clear and orderly; neat and tidy

rational number (i.e. fraction of two integers, math.)

field of rational numbers (math.), usually denoted by Q

set of rational numbers (math.)

both sides claim they're right (idiom)

rational expression (math.)