What does 五つ mean?
五つ is a Japanese noun meaning “five things” in English. It can also be translated as “eight o'clock (old time system)” depending on context. It is written as 五つ in kanji, いつつ in hiragana, and itsutsu in romaji. This word is part of JLPT N5 vocabulary.
Example sentence
この箱にはリンゴが五つ入っている。
This box contains five apples.