yǎn

fūyǎn

to elaborate (on a theme) / to expound (the classics) / perfunctory / to skimp / to botch / to do sth half-heartedly or just for show / barely enough to get by

fányǎn

to multiply / to reproduce / to increase gradually in number or quantity

yǎnshēng

to give rise to / to derive / derivative / derivation

yǎn

to spread out / to develop / to overflow / to amplify / superfluous

yǎnshēngwù

a derivative (complex product derived from simpler source material)

qièyǎn

bamboo box

zhòuyìfányǎn

Descendants are great in numbers. (idiom)

yǎnshēn

to give rise (to) / to spawn / to spread (to)

yǎnhuà

to evolve (of ideas, designs, constructions etc) / to develop and change

yǎnshè

diffraction