to be soaked in; to be flooded; to be submerged
to be immersed in (joy, memories, alcohol, etc.); to give oneself over to; to bask in
足が水に浸っている。
My feet are soaked in water.
大雨で庭が水に浸ってしまった。
The garden was flooded due to heavy rain.
床下まで浸る大洪水は初めての経験だった。
It was my first time experiencing a flood that soaked up to under the floor.