'to stick around' means to stay in a place, usually waiting for something.
- I'll stick around a bit longer and wait for him.
- I'm not going to stick around until the end. It'll be too late.
'to stick at' means to persevere, to continue doing something even if it is hard or unpleasant.
- She stuck at it until she had got it right.
- If you want to do it, you'll have to stick at it.
'to stick by' means to continue to support someone through difficult times.
- She stuck by her husband through all the scandal.
- We're best friends. We stick by each other through thick and thin.
'to stick by' also means to continue to support an idea or plan.
- I stick by what I said. I haven't changed my mind.
- They are sticking by their plans despite all the opposition.
'to stick down' means to fix something using glue.
- The label was coming off so I stuck it down again.
- I couldn't pull the carpet up. It had been stuck down with very strong glue.
'to stick out' is when an idea or someone is very obvious or noticeable.
- She's a very tall redhead so she sticks out in a crowd.
- She doesn't like him and it sticks out a mile.
'to stick to' means to restrict yourself to one thing.
- That's not what we were talking about. Can we stick to the point?
- No champagne for me. I was driving so I stuck to water all evening.
'to stick together' means to be united and support each other.
- We have to stick together if we want to win this.
- When things are difficult, people quickly learn to stick together.
'to stick up' a picture or notice means to attach it to a wall to display it.
- Where shall we stick up the notices? We want everyone to see them.
- His room in college was very bare until he stuck up lots of posters.
'to stick up for' someone or something means to defend them or it.
- You have to stick up for what you believe in.
- I'm big enough to stick up for myself. I don't need your help.