In my apartment, the bathtub and the washroom are separated by a single shower curtain.
Because the hiragana ends with an う sound, you know this word is a verb. The kanji itself means isolate and the verb vocab version is to isolate or to partition or to separate. You get the idea, anyways.
Why did you have to isolate him from the rest of the soccer players? Because all he could do was headers (へだ) and that was getting pretty dangerous. He would head everything in his reach. He was going crazy with headers. He had to be isolated!