YOU SAID:

Yellow finger nails are gross

INTO JAPANESE

黄色い指の爪が粗い

BACK INTO ENGLISH

Yellow fingernails are coarse

INTO JAPANESE

黄色い指の爪は粗い。

BACK INTO ENGLISH

The fingernails of yellow fingers are rough.

INTO JAPANESE

黄色い指の爪が荒れている。

BACK INTO ENGLISH

The fingernails of yellow fingers are rough.