益
エキ, ヤク, ま.す, まし, ます
benefit, gain, profit, advantage
JLPT1 G5 S10 F674
The relevant seal inscription form is 皿 dish/plate/bowl + the character 水 (water) turned on its side, indicating liquid filling a container → *fill* → *advantageous*; *benefit* (← possess full resources) → *profit* (← employ one's advantages to gaining profit). Note a variant form 益.
[Full Kanji Etymology List]