The best way to learn proper English is to read news report, and watch news on TV. Watching TV shows is a great way to learn casual English, slang words, understand culture reference and humor. If you have already watched these shows then you may recall the words used in the following dialogs.

MRS. WOLOWITZ:
Okay! Hold on, I\'m not decent!
"
title="
MRS. WOLOWITZ:
Okay! Hold on, I\'m not decent!
"
style="width: 100%;padding-left: 0px; padding-top: 0px;border: 0;"
width="100%" loading="lazy">
MRS. WOLOWITZ:
Okay! Hold on, I'm not DECENT!
The Big Bang Theory Season 6, Episode 4

Seems like a DECENT woman.
Game of Thrones Season 6, Episode 5

Let's share the road.
I could use some DECENT company.
Game of Thrones Season 1, Episode 3

Yeah, nothing tricky about it.
Just need DECENT steel.
Game of Thrones Season 3, Episode 6

Have the maids draw him
a bath and find him some DECENT clothes.
Game of Thrones Season 3, Episode 8