seize with teeth

grip - hold fast or firmly; "He gripped the steering wheel"

gnaw - bite or chew on with the teeth; "gnaw an old cracker"

bite off, snap at - bite off with a quick bite; "The dog snapped off a piece of cloth from the intruder's pants"

snap - bring the jaws together; "he snapped indignantly"

nibble - bite gently; "The woman tenderly nibbled at her baby's ear"

nibble - bite off very small pieces; "She nibbled on her cracker"