replace (something)

"Replacing" something means getting rid of an old thing and getting a new one instead. You replace things like:

• old machines
• machine parts that are old or broken
• parts of a building that have rotted or gone out of style
• employees who aren't doing a good job

Essentially, (sentence)

When you want to explain something complicated in a simple way, you can start your sentence with "Essentially, ___":

Essentially, the higher the model number, the newer and more powerful it is.

Another word that you can use in a similar way is "Basically".

What that means is that (sentence)

Use the phrase "What that means is that ___" to explain something that was just said. For example, imagine a science teacher explaining a new idea to her class:

They are symbiotic organisms. What that means is that each one depends on the other to survive.

You can leave out the word "that" if you want:

There's a hold on your account. What that means is you'll have to go down to the registrar's office and pay up those overdue fees first.

(someone) will have to (do something)

Use this phrase to talk about something that must be done in the future:

After you paint it, you'll have to wait a few hours for the paint to fully dry before you can apply the second coat.

tiles

"Tiles" are the hard things that you can use to line a floor or wall. Builders often use tiles for floors and walls in bathrooms and kitchens.

pipes

The "pipes" in a building are long, round, hollow things that water flows through.

We have a clog in the pipe underneath our kitchen sink. Could you send someone over to take a look at that?

as well as (something)

Use "as well as" to add an item in a list. It's similar to "and":

You have to think about the time spent as well as the cost.