All, Entire, Whole
adverb, noun
If you take all parts and put them together, you have all things. The entire collection. It is whole.
ぜんぶ
This is a jukugo word that uses the on'yomi readings of the kanji. You should be able to read this on your own.
リンゴを全部買うつもりです。
I'm going to buy all the apples.
全部の科目のテストで良いスコアでした。
I got good test scores in all subjects.
私のベーコンクッキー全部食べたのは一体だれ！？
Who the hell ate all my bacon cookies?!