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to exude (e.g. sweat); to ooze; to seep out
to reveal itself (of emotions, etc.)
傷口から血が滲み出た。
Blood seeped from the wound.
壁から水が滲み出ている。
Water is seeping from the wall.
喜びが顔全体に滲み出ていた。
Joy was radiating from his whole face.