gallivat
A small armed vessel, with sails and oars, used on the Malabar coast.
[They] found them next Morning out of Sight, excepting a Ketch and some few Gallivats, (small sort of Vessels something like the Feluccas of the Mediterranean, and hoists, like them, triangular Sails.)
Where it comes from
Probably from Portuguese galeota. Compare English galiot, galley.
Adapted from the Wiktionary entry gallivat (CC BY-SA 4.0).