The Spanish verb 'encontrar' (meaning 'to find' or 'to meet') comes from Latin elements. It was formed from the Latin prepositions 'in' ('in, into') and 'contra' ('against, opposite'), which combined to form 'in contra' meaning 'in opposition to'. This combination evolved into Spanish with the addition of the common Spanish verb suffix '-ar'. The semantic development from 'in opposition to' to 'to find/meet' likely came from the idea of coming up against or encountering something or someone.

Some related Spanish words include 'contra' ('against'), 'encontrarse' (the reflexive form meaning 'to meet each other' or 'to be located'), and 'encuentro' (the noun meaning 'meeting' or 'encounter'). All these words share the core idea of opposition or coming face-to-face with something or someone.

English speakers might recognize the 'contra-' element in words like 'contrary', 'counter', and 'encounter'. In fact, 'encounter' is a perfect cognate to 'encontrar', as both come from the same Latin elements and share similar meanings of meeting or coming upon something. The English word 'counter' (as in 'to counter an argument') also preserves the original sense of opposition from Latin 'contra'.