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Use "trendiness" in a sentence
"In the current issue of Beiträge zur Namenforschung (“Contributions to the Study of Personal and Place Names”), published in Heidelberg (perhaps your copy is late in the mail), David L. Gold, a New Yorker, explains that stump-compounded neighborhood names in Gotham are “an expression of trendiness and gentrification.”"
"With the popularity, or "trendiness" as the article says, of locally grown produce, quite a few people have taken a stab at gardening."
"As to whether Iberico lives up to the hype, well ... it depends on how much of a Ham Nerd you are, and how seriously you take things like "trendiness" and "European" and "expensive = good.""