The Spanish word 'primor', meaning 'excellence' or 'delicacy', traces back to the Latin word 'primores', which meant 'things of first rank'. 'Primores' itself derived from the Latin 'primus' meaning 'first'. The evolution from the concept of being 'first' or 'of first rank' to meaning 'excellence' or 'delicacy' is quite logical, as things of the highest rank were often associated with excellence and refinement.

Several common Spanish words share this root, including 'primero' (first), 'primo' (cousin, originally meaning 'of first degree'), and 'primitivo' (primitive, primary). All these words carry the basic notion of 'firstness' or 'primary importance' from their shared Latin ancestor 'primus'.

English speakers can connect 'primor' to several familiar English words that come from the same Latin root 'primus', such as 'prime' (main, principal), 'primary', 'primitive', and 'premier'. The word 'primordial' (meaning first in order or original) is particularly close in form to 'primor', though it has developed a different meaning. All these words maintain some connection to the concept of being first or foremost in their meanings.