isn't

ภาษาอังกฤษ

is +‎ -n't

isn't

คำหดย่อของ is not (คำกริยานุเคราะห์ปฏิเสธ^[1])
- 2013 July-August, Stephen P. Lownie; David M. Pelz, “Stents to Prevent Stroke”, in w:American Scientist:
  As we age, the major arteries of our bodies frequently become thickened with plaque, a fatty material with an oatmeal-like consistency that builds up along the inner lining of blood vessels. The reason plaque forms isn’t entirely known, but it seems to be related to high levels of cholesterol inducing an inflammatory response, which can also attract and trap more cellular debris over time.
  (กรุณาเพิ่มคำแปลของวลีหรือประโยคตัวอย่างนี้)

isn't (พหูพจน์ isn'ts)

(ภาษาปาก, ภาษาไม่มาตรฐาน) Something or someone that is defined by the lack of the characteristic being discussed.
- 2020 สิงหาคม 17, Bret Stephens, “On Being a Biden Conservative”, in w:The New York Times‎^[1]:
  The most obvious recommendations for Joe Biden are a succession of “isn’ts.” He isn’t Donald Trump. He isn’t Bernie Sanders. He isn’t angry, bigoted, cruel, demagogic, erratic, frightening or gross. He isn’t going to drive Americans to distraction or the country into a ditch.
  (กรุณาเพิ่มคำแปลของวลีหรือประโยคตัวอย่างนี้)

↑ Arnold M. Zwicky and Geoffrey K. Pullum, Cliticization vs. Inflection: English n’t, Language 59 (3), 1983, pp. 502-513