This is the 3057th most frequent Japanese word.
リー
"リー" (Rī) can be a katakana transliteration used for foreign names like "Lee" or for terms incorporating "li" sounds.
Here, 'リー' conveys the characteristic of being catchy or appealing, showing a derived slang usage.
このテレビコマーシャルはとてもリーです。
This TV commercial is very catchy.
In this case, 'リー' is used as a proper noun, likely a foreign name transliterated into Japanese.
リーさんは今週末パーティーに参加します。
Mr./Ms. Lee will attend the party this weekend.
Here, 'リー' is part of the compound 'リーグ', which means 'league', indicating a category or group for organized competitions.