The Spanish verb 'retrasar' (meaning 'to delay') is formed from multiple elements. It starts with the Latin preposition 'trans' meaning 'across' or 'through', which evolved into the Spanish 'tras' meaning 'behind' or 'after'. The word was then formed by combining the prefix 're-' (meaning 'back' or 'again'), 'tras', and the verbal suffix '-ar'. The combination of these elements creates the sense of 'moving something back in time' or 'putting something behind its scheduled time', hence the meaning 'to delay'.

Some simpler related Spanish words include 'tras' (meaning 'behind' or 'after'), which is commonly used as a preposition. Another related word is 'trasero' (meaning 'rear' or 'back part'), which shares the same root. These words all carry the concept of something being behind or after in either space or time.

English speakers might recognize the connection to words containing 'trans-', such as 'transport', 'transfer', and 'transition'. While these English words maintained the original Latin sense of 'across' or 'through', the Spanish 'retrasar' developed from the idea of moving something backward or behind schedule. The prefix 're-' is also familiar to English speakers, appearing in words like 'return' and 'repeat' with the same meaning of 'back' or 'again'.