Unambiguous means there is no danger of being misunderstood. Here are some sentences.
clear, not confusing.
Plain; obvious; clear
The roof is above the ceiling
He went along with their plan.
Absolute Zero is the temperature at which everything freezes.
Simple predicate
"I stopped trying to start the lawn mower out of frustration."Or"I am frustrated with trying to write a sentence about frustration."
Show me!
I have plants.
It is always best to be honest.
You are an accessory to murder...
She was sincere and honest.
Assume the position!
We are studying acidity.
The rules are beautifully simple
The roof is above the ceiling
He went along with their plan.
I am trying to construct a simple model.
There is an electromagnet in that crane