The Spanish word 'marrano' has an interesting etymology that traces back to Classical Arabic through the influence of Muslim rule in medieval Spain. It comes from the Classical Arabic word 'muḥarram' meaning 'forbidden thing', which entered Andalusi Arabic as 'maharram'. In Old Spanish, this evolved into 'maharrán', where it took on the specific meaning of both 'pig' and 'convert', particularly referring to Jews who had converted to Christianity but were suspected of secretly maintaining their Jewish faith. The word eventually evolved into modern Spanish 'marrano', historically carrying these same meanings, though its use as a derogatory term for converts is now considered historical.

Due to the unique historical and cultural context of this word's development in Spanish from Arabic, there aren't many commonly used, simpler Spanish words that share its etymology.

While English doesn't have any commonly used words directly related to 'marrano', the English word 'haram' (meaning 'forbidden' in Islamic law) comes from the same Arabic root 'muḥarram'. However, 'haram' is primarily used in English in contexts relating to Islamic dietary laws and religious practices.