whoa / wo / woe [wo:]
whoa – v. – stop, usually spoken as a command
wo – n. – 1. a sound made by a falconer to the bird; 2. also as a call to animals especially horses, or similar call
woe – adj., adv., int. & n. – adv. & int. – an exclamation of sorrow or lament; grieved, sorrowful, distressed; adj. – miserable, sorrowful, wretched; n. – 1. a lamentation; 2. a curse