mask

A cover, or partial cover, for the face, used for disguise or protection.

a dancer's mask; a fencer's mask; a ball player's mask

Just a few days ago, the Centers for Disease Control and Prevention—the CDC—issued new mask guidelines. Under these new guidelines, most Americans in most of the country can now be mask free. And based on the projections, more of the country will reach that point across the next couple of weeks.

That which disguises; a pretext or subterfuge.

Grouchy and wary and tender, he’s a sozzled hedonist seemingly out for himself—though his party-animal facade is just a mask for his bottomless generosity.

Appearance, likeness.

Come then, pure hands, and bear the head ⁠That sleeps or wears the mask of sleep, ⁠And come, whatever loves to weep, And hear the ritual of the dead.

A festive entertainment of dancing or other diversions, where all wear masks; a masquerade.

This thought might lead me through the world's vain mask.

A person wearing a mask.

the mask that has the arm of the Indian queen

Jones, now taking the mask by the hand, fell to entreating her in the most earnest manner, to acquaint him where he might find Sophia; and when he could obtain no direct answer, he began to upbraid her gently […]

To cover (the face or something else), in order to conceal the identity or protect against injury; to cover with a mask or visor.

They must all be masked and vizarded

To disguise as something else.

To conceal from view or knowledge; to cover; to hide.

Masking the business from the common eye

The opponent must not be able to recognize when we inhale and when we exhale. We achieve this by breathing with the diaphragm and we do not raise the shoulders while breathing. In particular we must mask when we are out of breath.

To conceal; also, to intervene in the line of.

To cover or keep in check.

to mask a body of troops or a fortess by a superior force, while some hostile evolution is being carried out

Mesh.

The mesh of a net; a net; net-bag.