shield
noun
°A broad piece of defensive armor, carried on the arm, formerly in general use in war, for the protection of the body.
"1599: Knock go and come; God's vassals drop and die; And sword and shield, In bloody field, Doth win immortal fame. — William Shakespeare, Henry V, Act III, Scene II, line 8."
°Anything which protects or defends; defense; shelter; protection.
"1592: Go muster men. My counsel is my shield; We must be brief when traitors brave the field. — William Shakespeare, Richard III, Act 4, Scene 3, line 56."
verb
°To protect, to defend.
°to protect from the influence of.