Middle Primitive Elvish
ber
root. valiant
berō
noun. valiant man, warrior
There are more words but they are from Tolkien's earlier conceptional periods. Tolkien likely changed these words as he evolved the aesthetics and completeness of the languages. You may even find languages that Tolkien later rejected. Do not mix words from different time periods unless you are familiar with the phonetic developments.
Below: Tolkien's Late Period (1950–1973). These are from Tolkien's late conceptual period — his most settled forms of the languages. Prefer these over the earlier ones above when composing new text.
A root in The Etymologies of the 1930s glossed “valiant”, its most notable derivative is the name S. Beren “Bold”. It had a variety of derivatives having to do with daring, such as ᴹQ. verya-/N. bertha- “to dare” and ᴹQ. verya/N. beren “bold”. The continued appearance of the name Beren in the later versions of The Silmarillion implies the root remained valid, but this name was only translated in The Etymologies of the 1930s, so it could have shifted in meaning.