訓 くも,-ぐも ・ 音 ウン
Sino-Vietnamese: vân
The rain radical 雨 on top and 云 below for sound: what hangs in the sky and brings rain is a cloud. Sino-Vietnamese vân, as in phong vân.
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空に白い雲が浮かんでいる。 (そらにしろいくもがうかんでいる)
White clouds are floating in the sky.