carrete
spool
car
automobile
+
reel
a cylinder on which film, wire, thread, etc., is wound
Carrete means spool. Think of it as a car0 (automobile0) with a reel1 (cylinder for winding1) attached, like a spool of thread in a sewing machine.
noun
- spoolA spool or reel for thread, film, or wireNecesito un carrete de hilo negro. // I need a spool of black thread.