あの山は雪でおおわれています。

that (someone or something distant from both speaker and listener, or situation unfamiliar to both speaker and listener)

mountain; hill; mine (e.g. coal mine); heap; pile; crown (of a hat); thread (of a screw); tread (of a tire); protruding part of an object; climax; peak; critical point; guess; speculation; criminal case; crime; mountain climbing; mountaineering; festival float (esp. one mounted with a decorative halberd); wall; wall tile; temple; temple grounds; wild

topic marker particle; indicates contrast with another option (stated or unstated); adds emphasis

snow

indicates location of action; at; in; indicates time of action; indicates means of action; cause of effect; by; and then; so; indicates continuing action; indicates certainty, emphasis, etc.

to cover; to hide; to conceal; to wrap; to disguise