The word "onych" refers to a nail or claw. This suggests that the word can be used to describe the hard, protective covering on the tips of fingers and toes in humans, as well as the sharp, curved appendages found on the feet or hands of certain animals. Both nails and claws serve similar purposes of providing support, protection, and aiding in various activities such as gripping or scratching. Therefore, "nail, claw" can be a suitable explanation for the given word.