bracer

noun

strap or sheath, commonly made of leather, stone, or plastic that covers the inside of an archer's arm to protect it while shooting

Pronunciation: /ˈbɹeɪsə/ / /ˈbɹeɪsɚ/

Etymology: From Middle English bracer, from Old French braceure; equivalent to brace + -er.

That which braces, binds, or makes firm; a band or bandage.
Something bracing; a stimulant.
“Country air in the fields, or in gardens, when breathed at proper hours, is an excellent bracer of the nerves, and a sure brightener of the complexion.”
“In fact I did not feel good. I was suffering from the morning sickness of the steady, heavy drinker. What I needed was a pick-me-up, a bracer.”
A covering to protect the arm of the bowman from the vibration of the string.
“To prevent the bow string from hanging on the left arm, it is covered with a piece of smooth leather, fastened on the outside of the arm, this is called a bracer.”
Armor for the forearm; a brassard.
A medicine, as an astringent or a tonic, which gives tension or tone to any part of the body.