The Spanish word 'primita' comes from combining the word 'primo' (meaning 'cousin') with the diminutive suffix '-ita'. The base word 'primo' itself derives from the Latin word 'primus' meaning 'first'. This Latin term was used to refer to cousins because they were considered 'first' in relationship to one another in extended family connections. The addition of the diminutive '-ita' creates an affectionate or endearing way to say 'little cousin' or 'dear cousin' in Spanish.

Some related simpler Spanish words include 'primo' (cousin), 'primera' (first), and 'primero' (first). All these words share the Latin root 'primus' meaning 'first'. While 'primo/prima' evolved to specifically mean 'cousin', the words 'primera' and 'primero' retained the original meaning of 'first'.

Several English words are related to 'primita' through the Latin root 'primus', including 'prime' (main or first), 'primary' (first or main), and 'primitive' (first or early form). While the Spanish word evolved to refer to family relationships, the English derivatives generally maintained meanings related to being first or original in various contexts.