noun
ball of thread; clew
Refers to a spherical or wound mass of thread, yarn, or string, often used in sewing, knitting, or crafts. 'Clew' is a less common English term for the same concept.
猫が糸玉で遊んでいる。
The cat is playing with a ball of yarn.
裁縫箱から糸玉を取り出す。
I take a ball of thread out of the sewing box.