crewel / crool / cruel [ˈkru:əl]
crewel – n. – a thin worsted yarn used for tapestry and embroidery
crool – n. & v. intr. – to make a repeated low, liquid or gurgling sound; this sound; slang – a combination of cool+cruel
cruel – adj. – 1. causing pain or suffering, especially deliberately; 2. indifferent to or gratified by another’s suffering; 3. merciless, harsh, unrelentingly severe