the.com/limbs
The four optional-feeling appendages doing all the heavy lifting, climbing, and dramatic flailing.
means The arms and legs of an animal, or the large branching boughs of a tree.
from From Old English lim, meaning a part or member of the body; the silent b crept in later, smuggled by overzealous Renaissance spellers who loved a phantom letter.
Tree branchBig boughs share the word with arms and legs.
Out on itRisky idiom borrowed from tree limbs that snap.
Phantom feelAmputees often sense limbs that no longer exist.