It means too old to be of use. Here are some sentences.
The spinning wheel is an antiquated machine. (Antiquated means no longer used or old fashioned)
The suffix in the word "antiquated" is "-ed."
The class was studying about civilizations during antiquity in their Social Studies class.
I was mortified by the very thought of crossing over the chasm via that shaky, antiquated footbridge.
Anti
The expression on her face was priceless. He used an antiquated expression to describe the book. The gift was an expression of love for his daughter.
No. Antiquated is a word meaning "outdated", but there is not "quated".
old-fashioned
passé
You can use the word Truss in a sentence like this.
Can you use the word concluding in a sentence? Done.
Just use it! Or do you mean, can you use the word beheld in a sentence.