extremely; utterly; very; so; cannot be more; extreme; utmost
It is utterly senseless to leave a newborn baby in the car and go shopping.
There is neither an air conditioner nor a fan in this room, and no breeze, either, so it's extremely hot in here.
I'm enjoying the feeling of utmost fulfillment, having completed and important mission successfully.
I put all the examples along with the meaning into flashcards to study just in case you forget. (I suggest downloading the app version for brainscape) With this you can even study on your phone!
Feel free to use this flash card deck I update regularly.
This grammar is really for intermediate-advanced learners. If you are looking to know where to start in Japanese and building a good foundation check out this blog post it.