Third-person singular simple present indicative form of clutter.(verb)
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Use "clutters" in a sentence
"Changing the name clutters up the language for no reason."
"It tends to disrupt whatever else your staff would normally be doing, not to mention it kind of clutters up the office."
"Though I like the concept of a search engine thinking ahead of my needs, i see cloned google results when I visit bing plus some additional content, which to be honest clutters the results."