The Spanish word 'gris' (meaning 'gray') traces its origins back to Proto-Germanic *grēwaz, meaning 'gray'. This word evolved into the Frankish term 'grîs', which maintained the same meaning. The word then made its way into Old Provençal as 'gris', before finally entering Spanish with its current form 'gris', preserving its original meaning of 'gray' throughout its journey.

While 'gris' itself is a relatively simple and common Spanish word, there aren't many other common Spanish words that are etymologically related to it, as it entered Spanish as a complete word from Old Provençal.

English speakers might be interested to know that while 'gris' and English 'gray/grey' look quite different, they are actually distant cousins! Both words come from the same Proto-Germanic root *grēwaz. While Spanish borrowed its word through Frankish and Old Provençal, English inherited its word 'gray' directly from Old English 'grǣg', which also descended from the Proto-Germanic *grēwaz. This is why English 'gray' and Spanish 'gris' mean exactly the same thing today.