不规则四边形 bùguīzésìbiānxíng irregular quadrilateral Origin Definitions Defs Strokes Stroke Words Sentences Sents 不规则 不規則 bùguīzé adjective irregular lacking a fixed pattern or order; irregular; incorrect四边形 四邊形 sìbiānxíng quadrilateral a geometric shape in a single plane formed by four straight lines; examples include rectangles, parallelograms, and rhombuses