Dash, Onslaught
Noun and する verb
やくしん
Tofuguが今年、大躍進を遂げたのは何故だと思いますか。
What do you think made Tofugu take such a big leap forward this year?
A leap when you advance on your enemy is a rush or dash or even an onslaught.
This is a jukugo word that uses the on'yomi readings of the kanji. You should be able to read this on your own.