ジョンは水泳部員です。

ジョンは水泳部員です。

John belongs to the swimming club.

ジョンは水泳(すいえい)部員(ぶいん)です。

Jon wa suiei buin desu.

は (は)

topic marker particle; indicates contrast with another option (stated or unstated); adds emphasis

水泳 (すいえい)

swimming

部員 (ぶいん)

staff; member (club, society, etc.)

です (です)

be; is

Readings: スイ、みず、みず-

Meaning: water

Readings: エイ、およ.ぐ

Meaning: swim

Readings: ブ、 -べ

Meanings: section, bureau, dept, class, copy, part, portion, counter for copies of a newspaper or magazine

Reading: イン

Meanings: employee, member, number, the one in charge