【电】 knob insulator
entwist; twiddle; twist
【机】 stranding; twist
beginning or end; cobbra; conk; crumpet; end; first; garret; hair; head
leading; nob; noddle; pate; sconce; side; top; twopenny
【医】 capita; caput; cephal-; cephalo-; head; kephal-; kephalo-
【化】 insulator