The Spanish word 'mezcla' (meaning 'mixture') comes from the Spanish verb 'mezclar' ('to mix'), which developed from Old Spanish 'mesclar'. This verb can be traced back to Vulgar Latin 'misculare', which itself was derived from the Classical Latin verb 'miscere', meaning 'to mix'. The evolution from Latin to modern Spanish shows typical sound changes, with the Latin 'sc' sound eventually becoming 'zc' in Spanish, and the final noun form dropping the '-ar' verb ending to create the noun 'mezcla'.

Some related Spanish words include the verb form 'mezclar' (to mix), which is actually more common than the noun form. You might also encounter 'mezclador' (mixer) or 'mezclilla' (denim, literally 'little mixture'), which are derived from the same root.

English speakers might recognize the connection to words like 'mix' and 'miscellaneous', which share the same Latin ancestor 'miscere'. The word 'medley' also comes from this same Latin root, having arrived in English through Old French. Understanding this connection can help remember that 'mezcla' refers to a mixture or blend of things.