vacuous
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"Vacuous" indicates a lack of thought or intellegence.
The word "ambiguous" is much closer to the answer.
"Ambiguous" means being open to more than one interpretation or having a double meaning.
ambiguous
Polysemy
Thesaurus
A hackneyed statement or notion.
YEs
Pun.
Polysemy
They are called adjectives and there are many thousands of them.
Words that have opposite meanings are called antonyms.
There are many books of Greek words and their meanings. They are called DICTIONARIES.Technique in Greek is "tekniki".
A petition.
It has 4 meanings
An ultimatum is a final, uncompromising demand or statement of terms, usually issued by one party to another in a dispute, warning of severe consequences if the terms are not accepted. It is often used as a decisive action to try to force a particular outcome.
Thesaurus
Yes, that type of statement has been known as a double entendre since the 1670s.
Words that have two or more meanings are called auto-antonyms.
synonyms
The Income Statement is also called the P&L (Profit and Loss) Statement.