kumamot, kamutin (-um-:-in) to scratch (one's self). Kumamot na lang siya ng ulo. He just scratched his head. Kinamot na lang niya ang ulo niya. All he could do was scratch his head (in exasperation).
v.
magkamot (mag-) to scratch (repeatedly). Nagkamot siya ng ulo. He scratched his head.
v.
mangamot (mang-) to scratch somebody. Nangamot ang pusa ng tao. The cat scratched the people.