overnight

Origin

Inherited from Middle English overnyght, from Old English ofer niht (“through the night, overnight”), equivalent to over + night. Verbal use (late 19th c.) may have been influenced by German übernachten (16th c.), though it could also have developed independently. Compare also Dutch overnachten (“to overnight”), Middle Low German ȫvernachten (“to overnight”), West Frisian oernachtsje (“to overnight”), Saterland Frisian uurnoachtje (“to overnight”).