ヨ, あま.る, あま.り, あま.す, あんま.り, あまる

too much, myself, surplus, other, remainder

JLPT3 G5 S7 F680

The relevant oracle bone form of this character is # pile of earth being smoothed (lazily) with a scoop, with a bronzeware inscription form adding split right and left → stretch the arms to both sides to disperse surplus earth in smoothing/leveling a pile → *surplus* (← level surplus earth). In Japan, was also adopted as a Shinjitai (new character form) to replace 餘, according to which also conveys the meanings *remain*; *leave*; *be left over*.

[Full Kanji Etymology List]