To have an injurious effect; to strike home, as a barb or insult.
To wound one's opponent in such a way that they bleed.
To destroy beyond recognition.
To physically harm as to impair use, notably by cutting off or otherwise disabling a vital part, such as a limb.
To render imperfect or defective.
Having fin-like appendages or flukes instead of legs, as a cetacean does.