What words annoy you when used wrong or people don't know the meaning of?

Infer and imply.

Being really pedantic, the OP not only used ‘what’ and ‘wrong’ incorrectly, but also ended with a preposition.

In speech, I tolerate anything, reluctantly, but I expect written text to be correct. Sadly, I am often disappointed.

My list is too long to write, but poor grammar annoys me more than misuse of vocabulary.
The worst offence has to be ‘ would of’ ‘ should of’ etc.
I am a retired language teacher.

'Uninterested' and 'disinterested'.

'Utilise' instead of 'use'.

'Convince' when the word should be 'persuade'.

'Alternate' when it should be 'alternative''

'ancestors' used instead of 'descendants'

And many more, I'm afraid..

No Cossy you're not dim at all, font has fallen into common usage but it is completely wrong to refer to the design of letters in an alphabet as a font.

A font is merely an adaptation of a lettering's design not the name of the original design itself.

For instance, Arial is the name of the original design of letter, Arial bold, say, is just a adaptation of Arial and not a typeface in itself because it's been adapted from the original design.

A font can only be part of a typeface it can't stand alone.

That's why, when someone is referring to different styles of lettering, to say "all the different fonts" is complete nonsense as it would be all the same just thinner or fatter, no different styles at all.

Pacific instead of specific.

Far more things to worry about than getting annoyed about how other people get words wrong.

Yous instead of you. 🤬

Used wrongly, not used wrong

I agree BlueBelle.

Alex Scott saying Congradalations

So at the beginning of each sentence, the very common ‘like’ seems to still be popular, defiantly instead of definitely and one used by those posting on caravan and camping sites, birth instead of berth. I could ramble on for hours on this subject.

Likely instead of probably

I've noticed that the younger generation will say the word LIKE every other word. Why?
I dislike the spelling of jail when it is gaol - unless you are American
some people will say hung instead of hanged ( I was told that a person is hanged and picture is hung)

Disinterested instead of uninterested.

Disinterested- objective.
Uninterested - of no interest.

Now that IS pedantic. Sorry.

loose instead of lose

Of instead of have
For example “should of” instead of “should have”

What's wrong with asking what words one uses wrong? Even BBC gets Febuary wrong.

People saying very fun, it's just wrong, it should be a lot of fun.

Mixing up 'may' and 'might', which happens in quite a few novels which I have been reading recently. It jars when a story which has been bumbling along happily in the past tense suddenly has a 'may' in the present tense.

10-year anniversary instead of 10th anniversary.

Their/there
They was

100% "Try and" rather than "Try to", Press Corpse.

I’ve seen written on social media so many times the phrase “I seen it” instead of either “I saw it” or “I’ve seen it”.

“I’ve had an invite” instead of invitation.

When American numbskulls like Trump say "aluminum" instead of "aluminium"