Noun and する verb
とうし
リスクの高い投資商品にまで手を出したくはないんです。
I don’t want to get involved in high risk investments.
Go ahead and throw your resources at the project. It could use the investment.
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!