Begrimed in a sentence as an adjective

I do not see why one would not generally prefer to defecate in a familiar and comfortable manner, in the open air, rather than a small, dim room begrimed with the stench and trace faeces of thousands of previous acts of defecation, performed by strangers.

Begrimed definitions

adjective

thickly covered with ingrained dirt or soot; "a miner's begrimed face"; "dingy linen"; "grimy hands"; "grubby little fingers"; "a grungy kitchen"

See also: dingy grimy grubby grungy raunchy