I have not yet had the privilege, or otherwise of being fired yet, but that meaning of the word fire is to get removed unceremoniously from your job.
Donald Trump used to use it a lot on the Apprentice, eg, “Your fired”. And, believe it or not, I used to like that show.
Fire can be quite hot, something you can sit in front of on those cold winter nights, whether it be a gas fire, or a wood fire, my preference.
Then there’s a phrase, set fire to, which can be good or bad depending on what eventually gets burned.
I have on the odd occasion had someone fire my imagination, probably a good thing being a writer.
To feel the fire of drinking neat whiskey, or in your heart driving patriotism, is something we have asked of us.
If you have a gun, then when you pull the trigger you fire it. Just be sure not to be pointing it the wrong way or any anyone.
A good indication is when you hear the words, ready, aim, fire. Especially if you are in the wrong place at the wrong time.
fire off a message, hopefully, a nice one
fire questions rapidly at someone (but not a politician, they have to have time to answer anything but the question asked)
or accidentally fire someone up by saying the wrong thing.