Enlargement
Expansion, Extension
noun, verbal noun
Go ahead and extend it and stretch it. That's how we'll do this enlargement, expansion and extension.
This is a jukugo word that uses the on'yomi readings of the kanji. You should be able to read this on your own. Of course, just to be dirty, the people who made up this word decided to use a kanji that read as かく. Dirty old monks that could see the future and speak English, ugh.
どうやってそんなにピアスの穴を拡張したの？
How did you expand your ear piercing hole that much?
ファイルのサイズを拡張したいのですが。
I'd like to extend the size of the file.
日本政府は、羽田空港と成田空港を拡張するべきか議論している。
The Japanese government is debating whether to enlarge Haneda and Narita airports.