窟窿眼儿 kūlongyǎnr small hole Origin Definitions Defs Strokes Stroke Words Sentences Sents 窟窿 kūlong hole hole; opening; cavity; pocket眼 yǎn noun small hole small hole; aperture; opening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.