The Spanish word 'sede' comes directly from the Latin word 'sedes', which meant 'seat' or 'chair'. In modern Spanish, 'sede' has maintained a similar meaning but has evolved to specifically refer to a headquarters, main office, or seat of power/authority. This semantic evolution makes sense as important chairs or seats historically symbolized authority and power, like a throne being the 'seat' of royal power.

A common related Spanish word is 'asiento' (seat), though this comes from a different Latin root. The word 'sede' is most often seen in formal contexts or in compounds like 'sede social' (registered office) or 'Santa Sede' (Holy See).

Several English words share the same Latin root 'sedes'. These include 'sedentary' (involving much sitting), 'sedate' (calm, quiet - as if seated), and 'supersede' (literally 'to sit above'). The word 'see' in ecclesiastical contexts, as in 'Holy See', is also related, coming from the same Latin root meaning 'seat' of authority.