• 満足まんぞく — satisfaction, contentment
• 満点まんてん — perfect score
• 満員まんいん — full (of people), no vacancy
• 不満ふまん — dissatisfaction
• 満月まんげつ — full moon
• 満了まんりょう — expiration, completion

The kanji 満 combines the water radical 氵 with the element 門 (gate) and character for full/fullness. It evokes the image of something being filled to capacity, like water filling a container or a room being full of people. The original form expressed this idea even more visually.

彼かれは 満足まんぞくそうな 顔かおをしている。
He looks satisfied.

この店みせは 満員まんいんです。
This restaurant is full.

“マン” is the most commonly used on-yomi. The kun-yomi “みちる” and “みたす” are used in native Japanese verbs and often appear in classical or descriptive texts.