to strike or pierce (something) with the beak or a pointed tool
to make (a hole) by pecking
to kiss (somebody) perfunctorily
said of a bird: to pick up (e.g. a worm) with the beak
to strike, pierce, or pick up something with or as if with the beak
informal to eat reluctantly and in small bites
She just pecked at her food
[Middle English pecken, alteration of piken to pierce]