Do you know the meaning of this word?

[Missingmybabysomuch]

Just that really, my DD was doing descriptive writing at school about a fire. She wrote about "acrid" smoke and her teacher hadn't heard of the word and had to look it up. My DH hadn't heard of it either. It surprised me as I didn't think it was a particularly unknown word but now I'm doubting myself! So I just wanted a hive mind poll to see whether it's a word generally known or not.

YABU - It isn't a word I've come across before.

YANBU - I know what acrid means.

I was a teacher until a couple of years ago and noticed that a lot of the younger student teachers we had coming though didn't have a good grasp of English and vocabulary. This was primary but I'd still expect teachers to be reasonably aware of grammatical rules etc.

The main thing I noticed, and in my current job also, a lot of younger people don't choose to read for pleasure which I definitely think contributes to this.