Cambiar and the English for the same, change, both come from the same root: cambiare, Latin, also meaning change.

Although this may not be obvious at first, we can see the mapping in the c-m-b of cambiar and the ch-n-g of change. The -m- and -n- are often interchanged; and the -g- and -b- both have that soft sound where you can hear how one can easily turn into the other, although it is a bit less common.

Why did the c- of the Latin turn into the ch- in change? Oh, easy: because it came to English via the French! And French has its own sets of patterns of course!

The Spanish brazo (“arm”) comes from the Latin bracchium meaning, “upper arm.” The Latin itself comes from the Greek brakhion. From these, we get English words such as bra (more recognizable if we remember the older, and original French, form of the word, brassière) as well as bracelet

We can see the br-c and its variations (br-z, br-s) in all the versions of the word.

The Spanish aval (“guarantee, as in a bank guarantee”) comes from the French aval, meaning “downward”. The French word comes from the Latin vallem, meaning valley — a valley does slope downward, after all. From that same root, we get the English… avalanche, which is an overwhelming amount of the valley tumbling downwards!

But all this leaves the question: how did the word for “downward” turn into the word for a “loan guarantee”? That part is unknown. But we could speculate that the creditor calling upon a guarantor to pay in the case of a default is a low point for the borrower. Or perhaps, you need a guarantor only when you’re at a low point yourself. Or…? Since we don’t know the history, we can create infinite variations that sound like they might make sense, as a fun exercise.

You can see the a-v-l root in all the variations clearly.

Relevant is a surprising cousin of the Spanish for Levantar (“to raise”). Both come from the Latin Levantare, also meaning “to raise”.

But what is the connection between raising and being relevant? Relevant was originally a legal term, in Scotland, meaning “to take over a property”: thus, raising up became taking control of which then became just making relevant.

The Spanish for “deaf,” sordo, comes from the Latin for the same: sordus.

From that same root is the English… absurd.

How did this abs… umm, ridiculous etymology come about? Well, with the ab– prefix (Latin for “off” or “away from”), it meant, “that which is unheard of.” Think of it as a metaphorical version of being deaf: so absurd, you have never heard about that happening in reality!

This, this is self-referential: it is an absurd etymology!