お姉 さんじゃない
one isanja nai
1. Not an older sister; Not a big sister
★ Common
Noun
#191267
1. Not an older sister; Not a big sister
1. indicates direct object of action
2. indicates subject of causative expression
+ 4 additional meanings1. honorific/polite/humble prefix
1. not
1. Mr.; Mrs.
2. politeness marker — explanation
1. how; in what way