訓 み(ちる),み(つ),み(たす) ・ 音 マン,バン
Sino-Vietnamese: mãn
Water 氵 gives the meaning and the right side the sound: water filled to the brim, so it means full or satisfied (Han Viet man, as in thoa man = satisfy).
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電車は満員でした。 (でんしゃはまんいんでした)
The train was packed.