\~{a}The command \~{a} is used to place a tilde accent over the letter 'a'. This is commonly used in languages such as Portuguese and Spanish to denote nasalization or other phonetic features.
Tilde accent over the letter 'a'.
\~{a}Tilde accent over the letter 'n', used in Spanish for the 'ñ' character.
\~{n}Tilde accent over the letter 'o', used in Portuguese for nasalized 'o'.
\~{o}