The Spanish word 'toallita' meaning 'small towel' comes from the Spanish word 'toalla' (towel) combined with the diminutive suffix '-ita'. The word 'toalla' itself can be traced back to Old Spanish 'tobaja', which ultimately derives from the Germanic word 'thwahljô' meaning 'towel'. The evolution from Germanic 'thwahljô' to modern Spanish shows typical sound changes, with the 'hw' sound simplifying and the 'j' eventually becoming 'll' in modern Spanish.

The most obvious related Spanish word is 'toalla' (towel), which is the base word from which 'toallita' is formed. The suffix '-ita' is a very common diminutive in Spanish that you'll see in many words to indicate something is small or cute, like 'perrito' (little dog) from 'perro' (dog), or 'casita' (little house) from 'casa' (house).

While the English word 'towel' and Spanish 'toallita/toalla' both ultimately come from the same Germanic root 'thwahljô', they took different paths into their respective languages. English 'towel' came through Old French 'toaille', while Spanish received it directly from Germanic sources. This is why the words still look and sound somewhat similar in both languages despite their long history.