YOU SAID:
He got ugly pants or trousers.
INTO JAPANESE
彼は醜いズボンやズボンを手に入れた。
BACK INTO ENGLISH
He got ugly trousers and trousers.
INTO JAPANESE
彼は醜いズボンとズボンを手に入れた。
BACK INTO ENGLISH
He got ugly trousers and trousers.
That didn't even make that much sense in English.