The Spanish word 'ventoso' meaning 'windy' comes from the Latin word 'ventosus', which had the same meaning. The Latin 'ventosus' was formed by combining two parts: 'ventus' meaning 'wind' and the suffix '-osus' meaning 'full of'. So literally, 'ventosus' meant 'full of wind', which naturally evolved to mean 'windy'.

Several common Spanish words share the same Latin root 'ventus'. The most basic is 'viento' meaning 'wind'. You might also recognize 'ventana' (window) - which historically was an opening to let in wind/air, and 'ventilador' (fan) - a device that creates wind/air movement.

English has borrowed many words from the same Latin root 'ventus'. The most obvious ones are 'ventilation' and 'vent', both relating to air movement. 'Ventilate' comes from Latin 'ventilare' meaning 'to expose to air'. Even the word 'window' has a connection - though it came through Old Norse 'vindauga' meaning 'wind-eye', showing a similar concept to Spanish 'ventana'.