'tow' originates from Old English, specifically the word 'tōwan'/'tōgian', ultimately from a Proto-Germanic root related to pulling (compare Old Norse 'toga' meaning 'to pull').

'tow' changed from Old English forms such as 'tōwan' and was influenced by related Germanic verbs (for example Old Norse 'toga'), then entered Middle English in forms like 'towe' and eventually became the modern English verb 'tow'.

Initially, it meant 'to pull' (often by rope or chain); over time it retained this core sense but extended to specific uses such as pulling vehicles or boats and to the figurative 'accompany' sense.