We use 'fix' when we make something work again. It means to repair something that is broken or not working.
I need to fix my broken phone today.
He fixed the door after it broke.
'Fix' as a noun means a trouble or problem. It is something hard to solve or get out of.
I am in a fix because I lost my keys.
She's in a fix after forgetting the exam date.
This 'fix' means an amount of a drug someone uses to feel better, often an addiction. It is informal and mainly about medicine or drugs.
He needs his fix every day for the pain.
She got her fix to stop feeling sick.
To 'fix' can mean to illegally change or arrange something to get a good result, like a game or election. This is often bad and dishonest.
They fixed the game to win the prize.
He fixed the result by changing numbers.
To 'fix' can mean to look at something very carefully and for a long time. It means to hold your eyes in one place.
She fixed her eyes on the painting.
He fixed his gaze on the speaker.
To 'fix' can also mean to quickly make or get food or drink for someone. It is informal and used in everyday talk.
Can you fix us some food quickly?
I fixed a cup of tea for my friend.