Donkey

dong′ki, n. the a .— ns. Don′key-en′gine , a small engine used in steam-ve els for loading and unloading, pumping water into the boilers, .; Don′key-pump , an extra steam-pump. [Still regarded as slang in 1823. Perh. = dun-ik-ie , a double dim. of dun , from its colour; or from Duncan , cf. Dicky .]