The Spanish word 'catamarán' comes from English 'catamaran', which itself has a fascinating origin in Tamil, a language spoken in southern India. The Tamil word 'kattumaram' literally meant 'tied logs' or 'raft', and was formed by combining two Tamil words: 'katta' meaning 'tied' or 'bound', and 'maram' meaning 'wood' or 'tree'. This makes perfect sense when you consider that the original catamarans were simple rafts made by tying logs together. Over time, this design evolved into the modern twin-hulled vessels we know today.

Since 'catamarán' entered Spanish through English relatively recently, there aren't any simpler or more common Spanish words that share its Tamil etymology.

The English word 'catamaran' is essentially identical to the Spanish 'catamarán', just without the accent mark. Both languages preserved the basic meaning from Tamil, though the vessel design has evolved significantly from the original tied-log rafts to modern twin-hulled boats.