root

A pig roots the earth for truffles.

Thou elvish-marked, abortive, rooting hog!

rooting about in a junk-filled drawer

When your baby is rooting, his head will turn to the side and he will open and close his mouth. If you put your finger in your baby's hand, she has a grasping reflex that makes her curl her fingers around yours and hold on.

I will go root away the noisome weeds.