usable

This makes the base iPhones much more usable, and so does the new base storage of 256 gigs.

Producers use energy from the Sun to combine molecules of carbon dioxide and water into a usable form producing a carbohydrate.

It kinda looks a little more video gamey because of how rock solid the drone footage is, but clearly very usable.

Human progress can be measured very precisely by how much energy we extracted from our environment, and how we made it usable to do things.

I really love this kind of sign a lot, where something is technically fully functioning the way it was designed, like this keypad, but it's not really usable without this extra layer of instruction.