i Register
In some senses, achi is marked as informal, colloquial. Watch for register when choosing this word.
noun
the eldest sister
an elder sister
a young female senior (usually within the Chinese Filipino community)
respectful term of address for the eldest sister
respectful term of address for an elder sister
name
A language of Guatemala.
noun
respectful honorific used before a name for the eldest sister
respectful honorific used before a name for an elder sister: Sister
respectful honorific used before a name for a young female senior (usually within the Chinese Filipino community): Miss; Sister