The Spanish verb 'besar' (to kiss) comes from the Latin verb 'basiare', which also meant 'to kiss'. 'Basiare' itself was derived from the Latin noun 'basium', which specifically referred to an erotic or romantic kiss. Over time, as the word evolved from Latin to Spanish, its meaning broadened to include kisses of all types, not just romantic ones.

The word 'besar' has given rise to several common Spanish words that Spanish learners might recognize. These include 'beso' (a kiss), 'besito' (a little kiss), and 'besazo' (a big kiss). The noun 'beso' is actually derived from the verb 'besar', rather than the other way around.

While there aren't any common English words directly related to 'besar', it's worth noting that English borrowed some scientific terms from the same Latin root. For example, 'basiate' (though very rare and technical) means 'to kiss' and comes from the same Latin 'basiare'. The absence of common English cognates is because English primarily uses the Germanic-derived word 'kiss' rather than the Latin-derived terms for this concept.