From Middle Dutch 'krul' (curly), from Proto-Germanic *kruzlaz — describing the action of twisting into spirals.
To form or cause to form into a curved or spiral shape.
From earlier 'crulle' meaning 'curly,' from Middle Dutch 'krul' meaning 'curly,' from Proto-Germanic *kruzlaz. Related to the motion of twisting or winding. Key roots: *kruzlaz (Proto-Germanic: "curly, twisted").