Etymology

pernoctation

per·noct·a·tion
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Today it means: The action of abiding through the night at a location; (countable) an instance of this; an overnight stay. Full definition →

Late Latin pernoctātiō
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The story

  1. Late Latin · learned borrowing frompernoctātiō“act of spending of the night (doing something, particularly praying)”
  2. English todaypernoctation

PIE word *nókʷts Learned borrowing from Late Latin pernoctātiō (“act of spending of the night (doing something, particularly praying)”), from pernoctō (“to spend the night”) + -tiō (action noun suffix). Pernoctō is from per- (prefix with the sense of completion or entirety forming verbs) + nox (“night; darkness”). By surface analysis, pernoctate + -ion.

Etymology from Wiktionary, CC BY-SA 4.0.