The opposite of heir is heiress. Heir is the male beneficiary while a heiress refers to a female who is to inherit wealth.
The female heir is called the heiress.
The feminine version of heir is heiress.
heir
heiress
An heiress
The noun for a male is an heir; the noun for a female is an heiress.
Heiress.
Heir is the male version of the word.
The female version would be an heiress.
Do you mean testator? If an heir receives a bequest, the testator is the person that gives the bequest to him/her.
Heir is the masculine of heiress.
alkalies are the opposite of acids and ha have heir pH higher than seven in the pH scale.