Slowa

Slowa: interjection. This word was never actually popular at any point in history, but when the word 'louda' was officially recognised, the Oxford English Dictionary decided that for the sake of consistency and symmetry they needed to include slowa as well, despite the fact it had probably never been uttered before then. This is in fact a practice performed by the OED multiple times in the past and has led to such words as 'incomplete', 'undead', and 'left'.