Etymology

sesqui-

Today it means: 1½; 1½ times Full definition →

Latin sēsqui-
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The story

  1. Latin · derived fromsēsqui-“1½ times; increased by 50%”
  2. English todaysesqui-

From Latin sēsqui- (“1½ times; increased by 50%”), from semi- (“half”) and -que (“and; also”).

Etymology from Wiktionary, CC BY-SA 4.0.