維基辭典YueWord
Jyutping:
hip3 wan6Original phonetic: /hiːp̚³ wɐn²²/
hip3 wan5Original phonetic: /hiːp̚³ wɐn¹³/
to amend the pronunciation of a character in a rhyming couplet that is perceived as not rhyming (i.e. that which is the result of phonological change)