Mathoms

Mathoms was an old word of the hobbit-dialect, not recorded as being in use outside the Shire. It was used to refer to "trinkets" or any item that had no particular immediate use.

Mathoms were many of the presents that passed from hand to hand by the Shire-hobbits - an important part of their culture - and whose owners did not wish to throw them away.

Eventually they were stored in the Mathom-house in Michel Delving.

Etymology

Mathom is a word invented by Tolkien, constructed from an obsolete Old English word māþum/máðm "treasure"

It is used as a rendering of the original Hobbitish word kast.