Increase
Addition, Growth
noun, する verb
An increase will add to what you had before. This is an increase, addition, or growth.
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.
ビエトがこの町を去ってから、 犯罪は着実に増加している。
Crimes have been increasing steadily since Viet left town.
この辺りでは、日本食レストランの数が増加しています。
The number of Japanese restaurants have been increasing around here.
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.