Curved punctuation marks ( ) used to enclose additional information, explanations, or asides within a sentence. They indicate that the enclosed material is supplementary to the main text.
From Late Latin 'parenthesis,' from Greek 'parenthesis' meaning 'a putting in beside,' composed of 'para' (beside) and 'en' (in) plus 'thesis' (a placing). The term originally referred to the rhetorical device of insertion, later applied to the punctuation marks themselves.
Parentheses are like architectural brackets for language—they create a separate space within a sentence where writers can whisper additional thoughts to readers. The Greeks invented both the concept and the word, recognizing the need for linguistic 'side rooms' in written communication.
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