Water has many dissolved minerals, gases, etc. which are invisible to our naked eyes.

We are all governed by an invisible force of attraction called gravitational force.

and that there are also people who have invisible disabilities.

But also has an invisible disability where had experiences where people have got on a bus or a train or whatever,

But the markets that brought us these lower prices didn't just magically appear by some invisible hand.

didn't just magically appear by some invisible hand.

They just get out like little invisible paint balls pelting and annoying the women around him.

like little invisible paint balls

But maybe the worst thing is what happens to your immune system: All over your body it reacts to tiny wounds and activates, fighting an invisible enemy, damaging healthy cells in the process.  

tiny wounds and activates, fighting an invisible  enemy, damaging healthy cells in the process.  

Invisible to enemy RADAR, it can intercept and strike any target without warning.

that what you really need to do is be invisible to the enemy.

UV rays are invisible and cannot be felt on the skin. The heat of the sun that you feel

I think it's partly invisible because it happens one at a time. You know its 5,000 children

making it almost invisible to its prey.