The Spanish verb 'esperar' comes from the Latin verb 'sperare', meaning 'to hope'. 'Sperare' itself was derived from the Latin noun 'spes', meaning 'hope'. Over time, as the word evolved from Latin to Spanish, it not only retained its original meaning of 'to hope' but also expanded to include the meaning 'to wait', reflecting how hoping and waiting are often interconnected actions.

Some related Spanish words include 'esperanza' (hope, noun), 'desesperado' (desperate, literally 'without hope'), and 'inesperado' (unexpected). These words all share the same root and form a family of words related to hoping and waiting.

While English doesn't have many common words directly related to 'esperar', we do have some borrowed words that share this Latin root. For example, 'desperate' (from Latin 'desperatus', meaning 'given up hope') and 'prosper' (from Latin 'prosperare', which contains 'spes' and originally meant 'to cause to succeed or make happy according to one's hopes'). The medical term 'despair' also comes from the same Latin root, literally meaning 'down from hope'.