underbar

Noun

 * 1) A bar placed under a symbol.
 * $$\underline{A}$$ is the letter A with an underbar.

Verb

 * 1)  To place a bar under (a symbol).

Etymology
, equivalent to. Compare 🇨🇬 and 🇨🇬, 🇨🇬, 🇨🇬 and 🇨🇬.

Adjective

 * 1) wonderful, marvelous