You can use it like this: I have a headphone.
An example sentence for this could be: Jack is going to the store to pick up a new pair of headphones.
You put the headphone in your ears.
A good way to use retentive in a sentence is... "How do you use the word retentive in a sentence?"
use it by saying- how can you use the word ebullient in a sentence?
Can you use the word concluding in a sentence? Done.
How do you use the word gerontology in a sentence?
How can you use the word infectious in a sentence
You can use the word Truss in a sentence like this.
Just use it! Or do you mean, can you use the word beheld in a sentence.
You can use an underscore to remove a word out of a sentence. It can be placed where the word was.
Since that is not a word I would not attempt to use it in a sentence.
You just did use the word colonize in a sentence.