'anywhither' originates from English, specifically a compound of 'any' and 'whither', where 'any' ultimately comes from Old English 'ænig' meaning 'one; any' and 'whither' comes from Old English 'hwider' meaning 'to which place'.

'hwider' (Old English) became 'whither' in Middle English; combined compounds like 'any-whither' or 'anywhither' appeared in Early Modern English and later as an archaic/poetic form 'anywhither'.

Initially it meant 'to any place' (literal motion toward any place); over time it retained that meaning but fell out of common use and is now considered archaic or poetic, largely replaced by 'anywhere' or 'to any place'.