This is a jukugo word, which usually means on'yomi readings from the kanji. You know the はつ part, which gets shortened to はっ. The 見 is unlike what you learned with 見, though.
In order to remember that this is けん, imagine you're going out to make a discovery of some strange new lands. With strange new lands, there comes strange new people. This one has a samurai named Ken けん on it. He's trying to discover new things too!
I found hornworms on my balcony.
It’s very important to have early detection for cancer.
I discovered how to make money from Facebook. It’s easy. Just go to your account settings, deactivate your account, and go to work.