the final (of a syllable) (Chinese phonology) / rhyme / appeal / charm / (literary) pleasant sound
韵
=
音
+
匀
:
Yu the Great (yu) has to wear a uniform (匀) and repeat the rhymes (韵) played out loudly on a loudspeaker (音) in the encampment's bathroom ((e)n4).
the final of a Chinese syllable (the component of a syllable remaining after removal of the initial consonant, if any, and the tone, e.g. the final of "niáng" is "iang")