shield
noun.
a protective covering or structure
noun.
armor carried on the arm to intercept blows
Synonym: buckler
noun.
hard outer covering or case of certain organisms such as arthropods and turtles
Synonym: carapace, cuticle, shell
verb.
protect, hide, or conceal from danger or harm
Synonym: screen
verb.
hold back a thought or feeling about
She is harboring a grudge against him
Synonym: harbor, harbour