That hides: see the verb.

That veils, covers, or conceals something.

That cloaks or conceals something. Obsolete.

That shrouds, veils, covers, or conceals.

That muffles (muffle, v.1); esp. that conceals or obscures.

That masks (in various senses of mask, v.4). Also (in early use): †masquerading (obsolete); †hypocritical (obsolete).

That shelters, protects, or conceals.

Veiling, concealing.

Serving to conceal. rare.

That secludes.

That hides or is hidden away.