螺絲母 (lo4 si1 mou2) — a nut (for a screw, bolt) in Cantoneseloˎ₄螺siˉ¹絲mouˊ²母简 螺丝母Mandarin Pinyin: luo2 si1 mu3Meaning of 螺絲母nouna nut (for a screw, bolt)