ungu- +

(Latin: nail, claw, hoof)

ungulate
1. Resembling a hoof in shape or function.
2. Belonging to, or characteristic of the Ungulata, the hoofed mammals.
unguligrade
1. Moving on the tips of the digits.
2. A reference to an animal that walks on an enlarged nail, or hoof, on each leg; such as, a horse.
vallecula unguis, sulcus matricis unguis
The cutaneous furrow in which the lateral border of the nail is situated.

A cross reference, directly or indirectly, involving a word unit meaning "nail (finger, toe); claw": onych-.