mat

As a verb impair

is to weaken; to affect negatively; to have a diminishing effect on.

As an adjective impair

is (obsolete) not fit or appropriate.

As an adjective opaque is

neither reflecting nor emitting light.

As a noun opaque is

(obsolete|poetic) an area of darkness; a place or region with no light.

As a verb opaque is

to make, render (more) opaque.

As a noun waterbed

is a bed with a tough plastic mattress filled with water.

As a noun mat

is a flat piece of coarse material used for wiping one’s feet, or as a decorative or protective floor covering.

As a verb mat

is to cover, protect or decorate with mats.

As a proper noun Mat

is a diminutive of the male given name Matthew.

As an adjective undefined is

lacking a definition or value.

As proper nouns the difference between mat and ruger

is that mat is a diminutive of the male given name Matthew while Ruger is {{surname|A=An|American}.

As a noun mat

is a flat piece of coarse material used for wiping one’s feet, or as a decorative or protective floor covering.

As a verb mat

is to cover, protect or decorate with mats.

As a proper noun die

is god.