bite (on), champ, chew, chomp (on), crunch (on), gnaw (on), masticate, nibble

ruminatemunch, nosh, snackconsume, eat, ingest, swallowbolt, devour, gobble (up or down), gorge, gulp, scarf, scoff, snack, wolfnip, peck (at), pick (at)gum, mumble

sink one's teeth into