inner
adj. B2 Upper Intermediate Oxford US //ˈɪnɝ// UK //ˈɪnɐ// in·ner
adj. located on the inside of something, or related to your private thoughts and feelings.
adj. situated inside or further in; relating to the mind or spirit rather than the external world.
She keeps her inner thoughts in a private diary.
The inner walls of the old fortress were much thicker than the outer ones to protect the soldiers.
Meditation can help you find inner peace by allowing you to observe your emotions without reacting to them immediately.
Usage
Typically used before a noun; often contrasted with 'outer' or 'external'.