Someone (maybe you) stops trying the moment things get hard. You want to tell them to keep at it, from a gentle nudge to a straight-talking push.
Way 1 · best default
Clear and direct. You're saying they stopped too soon and can still do it.
Examples
It's only your second lesson. Don't give up so easily.
Don't give up so easily, the first week is always the worst.
In a conversation
A: I tried that app for three days. Spanish just isn't for me.
B: Three days? Don't give up so easily.
Way 2 · keep at it
Friendly advice to keep going. It suggests it'll get easier if they don't stop.
Examples
Guitar hurts your fingers at first. Stick with it.
If you stick with it, you'll see results in a month.
Common mistake
Not: Stick on it.
Say: Stick with it.
It's always "stick with" something you keep doing. "Stick on" means to glue something onto a surface.
Way 3 · gentle nudge
Kind and light. Just one more try, no pressure.
Examples
The cake sank? Give it another go with less sugar.
Give it another go. You were really close.
In a conversation
A: I couldn't get up on the surfboard once.
B: Everyone falls on day one. Give it another go tomorrow.
Common mistake
Not: Try one more time again.
Say: Give it another go.
"Give it another go" (or "another try") already means "try once more". No need to repeat "again".
Way 4 · not over yet
For someone about to quit something big, like a course, a business or a match.
Examples
Your shop's only been open six months. Don't throw in the towel yet.
We're two goals down, but don't throw in the towel yet.
Way 5 · blunt truth
Very direct: they quit at the very first problem. Only with people who can take it.
Examples
Be honest, you gave up at the first hurdle.
You gave up at the first hurdle last time. Not again.
In a conversation
A: The gym was too hard, so I cancelled.
B: You went once. You gave up at the first hurdle!
Read the moment, then choose the way that fits it best.
What a translation app gives you, and what people actually say.
Not: He is prone to surrendering.
Say: He gives up so easily.
"Surrender" is for armies and police. For everyday quitting, just say "give up".
Pick one and practise it in a real conversation. Save the ones you want to remember.