The word 'switch' first appeared in English in the late 16th century, originally referring to a thin, flexible twig used for whipping. Its origin is uncertain but is likely related to early modern Dutch 'swijch' meaning a flexible shoot or twig. The core concept of flexibility and quick motion inherent in a whipping twig provided the logical foundation for its later meanings. By the mid-18th century, this sense of a slender, flexible rod extended to mechanical devices like a railroad switch (which moves flexibly to divert tracks) and an electrical switch (whose lever moves quickly to make or break a circuit), from which the modern verb meaning 'to change or exchange' naturally evolved.

The word 'switch' is a simplex word of Germanic origin. It is not productively formed from smaller, recognizable morphemes in modern English.