نَكَّاثٌ

One who undoes, or untwists, thread, and twists it again, or, to twist it again. (TA.) [See نِكْثٌ.]

نَكَّاثٌ لِلْعَهْدِ (tropical:) One who is wont to dissolve, violate, or break, his covenant, or compact. (TA.)