Question 1

What does "roughen up" mean?

Accepted Answer

To make a surface physically coarser or more abrasive, often to improve grip or adhesion.

Question 2

How do you use "roughen up" in a sentence?

Accepted Answer

You should roughen up the wall with sandpaper before applying the plaster.

Question 3

Is "roughen up" formal or informal?

Accepted Answer

"roughen up" is register-neutral — appropriate in both casual and formal contexts. Primarily used in practical or technical contexts — painting, craft, construction — where a rough surface is needed for adhesion or grip. Less common as a standalone phrasal verb; speakers often say 'roughen' alone.

roughen up

"up" 포함 구문