antic, antique

Antic or antic ( an tick )  means a playful trick or prank, or a strange or grotesque pose--
He became impatient watching the child perform one antic after another.
He came up with an antic that no one could imitate.
Antic is also a verb ( action word ), meaning to play or frolic--
The lambs antic on the lawn when the weather is fine.
Antic is also an old-fashioned word for a clown or grotesque character----
At the end of the scene an antic appears, and the other characters exit one at a time.

Antique or antique ( an teek ) means old--more than 50 years old for some purposes, more than 100 years old for others--
This is antique table.
He wants an antique pool table.
Antique may be used as a noun ( thing or idea ) meaning an old thing--
Is this table an antique?
If we keep this a few more years, it will be an antique.

Now that you know that, you can say--
"Don't let the children antic near that antique sideboard. They might scratch it."

Note--"antics" means playful tricks or pranks--
They like to watch the antics of the young goats in the Spring.
Not to be confused with "antiques", meaning more than one old thing--
They went out to look at some antiques.
Note # 2--"antick" is an old-fashioned spelling of "antic"--
He performed an unusual antick that became a part of the play.