cutting a fingernail (or toenail) to the quick;  cutting a nail too close;  deep-set nail;  deep-set part of nail
 fetlock (horse, etc.);  spur (chicken, etc.);  cockspur;  dewclaw (dog, etc.)
 artificial fingernail;  fake fingernail
 nail (e.g. fingernail, toenail)
 cutting one's nails at night (said to cause one to miss the deathbed of one's parents)
 half-moon (of a fingernail)
 groove in a shamisen player's fingernail caused by the friction of the string of the instrument
 claw hoe;  coal-trimming rake
 African spurred tortoise (Centrochelys sulcata);  sulcata tortoise