・have apprehension(s) of danger, earthquakes, etc.

・She felt apprehension for [about] her son's health. 息子の健康を不安に思った.

・They were filled with apprehension that there might be another war. また戦争になるのではなかろうかと不安だった.

2 【法律】 捕縛, 逮捕 (arrest).

・the apprehension of a thief.

3a (比較的皮相な)理解, 理解力 (understanding).

・a person of dull apprehension 理解力の鈍い[物わかりの悪い]人.

・be above a person's apprehension 理解できない.

・be quick [slow] of apprehension 理解が早い[遅い].