sb. Amer. [Sp. (also Pg. and It.), of doubtful origin.] A rope of esparto grass or other material. Also attrib.
1856. Mayne Reid, Hunters Feast, xvii. 141. He is exposed, moreover, to the perils of the creaking soga bridge.
1910. H. Hesketh Prichard, in Blackw. Mag., June, 842/2. He [the grey fox] is an intolerable nuisance, gnawing through the sogas of the horses.
Hence Soga v., to tie up with a soga or sogas.
1902. H. Hesketh Prichard, Thro Heart of Patagonia, xi. 161. The next morning we sogaed up the horses and set out.