1797, from Italian, "poem of six-lined stanzas," from sesto "sixth," from Latin sextus (see six). Invented by 12c. Provençal troubadour Arnaut Daniel. The line endings of the first stanza are repeated in different order in the rest, and in an envoi.
sesquicentennial
sesquipedalian
sessile
session
sestet
sestina
Set
set
set off
seta
set-aside