Increase
Addition, Growth
noun, する verb
An increase will add to what you had before. This is an increase, addition, or growth.
ぞうか
This is a jukugo word, which usually means on'yomi readings from the kanji. If you know the readings of your kanji you'll know how to read this as well.
お正月に餅を食べ過ぎて、体重が五十キロも増加した。
I ate way too much mochi on New Years and my weight increased by 50 kilos.