Build Up

A build up of dust. How rewarding.

They're two ways we can use the word build up. To build up something, or a build up of something.

Let's start with the first.

If we need to build up something, we need to make it grow or prosper. We need to build up our team, our product, or maybe build up our product from the ground up. Two phrasal verbs in one sentence.

Now the second way we can use it is a little bit more hard. A build up of something means something accumulated over time. A build up of mold, grease, dirt....

Think about it. If Babushka doesn't wash her stove every so often with Mr.Muscle and I don't mean Domestos, it will build up with grease and be harder to remove.

Let's look at an example from a video talking about Premium Fuel in cars.

On top of that, a group of automakers banded together and developed a top tier gasoline standard with extra detergents that remove more buildup than the lowest permissible standard.

In this example, they're not specific to what build up is. Buildup can be anything which accumulates over time. It is saying this extra detergent removes it. Detergent in my opinion has always been something like a soap. I will post below the exact time stamp of where this sentences is said.

Please go to the link below at timestamp 5:05. It's a little hard to understand, so if your English is weak, you might have a hard time to follow.