“whole / all” in Japanese is 全, read zen, matta, sube (ぜん, まった, すべ). It is a Grade 3 Kyōiku kanji, taught in year 3 of Japanese elementary school, and appears in words such as 全部 (all).
What does 全 mean?
全部食べる。
Same sound, different character — the classic trap. Compare them side by side: