i-adjective
feeling grieved; unsatisfied; unsettled
Describes a lingering feeling of dissatisfaction or emotional unrest; often used when one cannot accept a situation or feels something is not right.
彼の説明を聞いても、どうも気持ちが納まらない。
Even after hearing his explanation, I still feel unsatisfied.
あの判定には、まだ納まらない思いがある。
I still have a feeling of grievance about that decision.