纽襻儿 niǔpànr button loop Definitions Defs Origin Strokes Stroke Words Sentences Sents 纽襻 紐襻 niǔpàn button loop a loop used to fasten a button儿 兒 r particleaffix [erhua suffix] A suffix attached to a word to form a retroflex ending, often indicating a small size, a sense of familiarity, or turning a word into a noun.