c. 1300, from late Old English tadige, tadie, of unknown origin and according to OED with no known cognates outside English. Applied to loathsome persons from 1560s. Toad-strangler "heavy rain" is from 1919, U.S. Southern dialectal.
Tlingit
tmesis
TNT
to
to-
toad
toadstone
toadstool
toady
toast
toaster