按
アン, おさ.える, しら.べる

hold, consider, investigate

JLPT0 G13 S0 F5000

As per 安# (rest in/on) + 手 hand/action indicator → rest a hand on (forcefully) → *press down upon with the hand(s)* → *rub*. Also, *examine/investigate* (← press an object in various spots in examining it).

[Full Kanji Etymology List]