Pick
From MUME
Pick is a thief skill that allows you to pick locks. Not all locks can be picked.
It is wise to make sure the lock is locked first. If you attempt to pick a lock that is actually unlocked, there is a chance you might accidently lock it.
Holding/Wearing lockpicks will improve your chances at picking.
Examples:
> pick door north > pick oakdoor > pick hiddensafe