n.
1.a protective covering or structure
2.armor carried on the arm to intercept blows shield v.
1.protect, hide, or conceal from danger or harm
2.hold back a thought or feeling about
Idiom of the Day
one-upmanship
the ability to keep ahead of others, the ability to keep an advantage
The man's one-upmanship and his desire to be better than everyone else makes many people dislike him.