Broader meaning in Hawaiian, since females of your parents' generation (or older) may be called `anakē, even if they are of no relation. An `anakē is a female friend of your parents.
Comments on word
Note: makuahine is an older term, which has fallen out of use with this meaning (although it still means 'mother'). makuahine `ōpio used to mean 'parent's younger sister' specifically, while makuahine makua meant 'parent's older sister'.