I'm not trilingual yet!
He was trilingual, so he could translate for them all.
Someone who can speak three languages is said to be trilingual.
Because trilingual is quite a specific word, it is difficult to find with a true synonym for it. The closest word would be polyglot, which is a general term for someone who can speak two or more languages.
Trilingual is "trilingue" in French.
Multilingual or trilingual
Can you use the word concluding in a sentence? Done.
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.
How do you use the word decibel in a sentence?What is decibel used for?
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.