sesqui-

prefix

1½; 1½ times

“sesquialterate, sesquitertian, sesquioctave”

OriginLatin sēsqui- →
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Meanings

prefix
  1. 1½; 1½ times
  2. In a ratio of 1 and 1/x to 1

    sesquialterate, sesquitertian, sesquioctave

Origin

  1. Latinsēsqui-“1½ times; increased by 50%”
  2. Englishsesqui-

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

More words from Latin

Full word history & related roots →
Cite this entry
APA

sesqui-. (n.d.). In WatkinsX Dictionary. Retrieved November 3, 2026, from https://dictionary.watkinsx.com/word/sesqui-

MLA

“sesqui-.” WatkinsX Dictionary, https://dictionary.watkinsx.com/word/sesqui-. Accessed November 3, 2026.

Chicago

WatkinsX Dictionary, s.v. “sesqui-,” accessed November 3, 2026, https://dictionary.watkinsx.com/word/sesqui-.

Source: sesqui- on Wiktionary, CC BY-SA 4.0.