Lego

The revised Danish words for "play well and "I assemble" in Latin . It's also a building brick invented and patented by Danish Ole Kirk Christiansen.

Let's go to LEGOLAND this winter break for a vacation

Atom

The particle that makes up everything (except stuff smaller than it: quarks, neutrons ect) including matter.

There's not an atom of truth in what he said.

Mask

a paper substance that can be worn on your face, is reusable and keeps germs out

That's a nice mask you bought!