gargle v.

"enormous," 1590s, from Gargantua, name of the voracious giant in Rabelais' novels, supposedly from Spanish/Portuguese garganta "gullet, throat," which is from the same imitative root as gargle (v.).

"grotesque carved waterspout," connected to the gutter of a building to throw down water clear of the wall, common in 13c.-16c. buildings; late 13c., gargoile, also garguile, gargule, etc., "carved mouth of a rain spout, a gargoyle," from Old French gargole, gargoule "throat;" also "carved downspout," in the form of a serpent or some other fanciful shape, also from Medieval Latin gargola, gargulio (see gargle (v.)). "An archaic spelling, retained in books; better gargoil or, in more modern form gargel" [Century Dictionary].

"make a turkey noise," 1670s, probably imitative, perhaps influenced by gobble (v.1) or gargle. As a noun from 1781.