γαμπρός

Etymology: From Ancient Greek γαμβρός (gambrós), which originally meant 'relative by marriage'. It derives from the Proto-Indo-European root *ǵem- ('to marry'). This same root gave us English words like 'gamete' and is related to the Greek verb γαμώ (gamó, 'to marry'). The semantic shift from 'relative by marriage' to specifically 'son-in-law' or 'groom' occurred over time as the word became more specialized.