The Spanish word 'fragor', meaning 'loud noise' or 'crash', comes from the Latin word of the same spelling 'fragor', which meant 'crash' or 'noise of breaking'. This Latin noun was derived from the verb 'frangere', meaning 'to break'. The connection between breaking and noise makes intuitive sense - when something breaks, it often produces a loud, crashing sound. Over time, the meaning in Spanish has maintained its association with loud, crashing noises, though it's not necessarily tied specifically to the sound of things breaking anymore.

Some related Spanish words that might be more familiar to Spanish learners include 'fractura' (fracture), 'frágil' (fragile), and 'fragmento' (fragment). All of these words share the same Latin root 'frangere' (to break), and their meanings all relate to breaking or being breakable.

English speakers can connect 'fragor' to several familiar English words that come from the same Latin root 'frangere', such as 'fragile', 'fraction', 'fracture', 'fragment', and even 'frail'. All these words maintain some connection to the concept of breaking or being breakable. While 'fragor' evolved to emphasize the noise aspect of breaking, these English relatives focused more on the physical act or state of breaking.