alcohol

This is quite apt, as I’m writing this with a bit of a hangover (don’t judge me). But whether you’re a drinker or not, you might not know that the word ‘alcohol’ has an interesting backstory.

Like lots of words starting with ‘al-’, ‘alcohol’ comes from an Arabic word: ‘al-kohl’. If you’re someone who likes a smoky eye, you’ll probably recognise that last bit from kohl eyeliner. And that’s what it meant – by the 10th century, ‘al-kohl’ was used to refer to the mix of lead-based minerals (including galena, cerussite, laurionite, phosgenite, stibnite and malachite) used as eyeliner in the Middle East. (And no, rocking a lead-based cat-eye isn’t a good idea – research has found that lots of people got lead poisoning as a result. There’s an upside though. It also acted as a toxin, killing off infections that got into people’s eyes when the Nile flooded. Bonus.)

Much like me walking home after a night at the pub, the word ‘alcohol’ took a slightly circuitous route to get to English. Because kohl was made by grinding, over time, the meaning of ‘al-kohl’ shifted in Arabic to mean any very fine powder. In the 13th to 14th centuries, Medieval Latin borrowed the word as ‘alcohol’ or ‘alcochol’, using it for fine powders or refined substances that were ground or distilled. By the 14th to 16th centuries, alchemists were applying it to the purified ‘essence’ of something – for example, ‘alcohol of wine’ meant highly concentrated ethanol. In the 17th and 18th centuries, the meaning narrowed further in English to ethanol specifically, and then more broadly to any drink containing it. AKA, booze.

Us humans have been finding ways to get pissed for the best part of 13,000 years. In 2018, residue from a beerlike fermented drink was found in stone mortars in a cave in Israel. They’re believed to date back to 9750–11,750 BCE. There’s also a theory that the hunt for beer is what prompted us to start farming cereals, which led to one of the biggest social-technological changes in human history. (It might also have been the hunt for bread or porridge, but that doesn’t make for such a good story.)

algebra

SHUDDER. I was terrible at maths at school, and even the thought of algebra still fills me with horror. But, I’m all for feeling the fear and doing it anyway (except when it comes to sharks, which I’m also very scared of), which is why algebra is my word of the week. Also, it has an interesting backstory which isn’t, as you might assume, anything to do with Greek.

Before we get into that though, let’s have a quick refresher for anyone who, like me, can only vaguely remember their school days. Algebra is a branch of maths that focuses on studying mathematical symbols and the rules for manipulating those symbols to solve equations (that just sent another shiver down my spine), which apparently makes it easier to solve complex problems. Here’s a super-simple algebraic equation:

2x + 5 = 11

And here’s a really not simple explanation for how to solve it (thanks to my robot overlord, sorry ChatGPT, for doing the maths for me. Also, feel free to skip to the next paragraph if you just don’t care):

In this equation, ‘x’ is the variable, and the objective is to find the value of ‘x’. First, we isolate the variable ‘x’ by subtracting 5 from both sides of the equation:

2x + 5 - 5 = 11 - 5

This simplifies to:

2x = 6

Next, to isolate the variable ‘x’, we divide both sides of the equation by 2:

(2x)/2 = 6/2

This simplifies to:

x = 3

So, the solution to the equation is x = 3.

For anyone who’s still here, here’s why algebra is called algebra. The word comes from the Arabic phrase ‘al-jabr wa'l-muqabala’, which means ‘reunion of broken parts’ or ‘restoration and balancing’, referring to the process of restoring balance by transferring terms from one side of an equation to the other. Nice, right?

This rather romantic-sounding term was coined by the Persian mathematician Muhammad ibn Musa al-Khwarizmi in the 9th century. I have mixed feelings about Al-Khwarizmi because he came up with this lovely phrase (like), but he also pretty much invented algebra in his book ‘Kitab al-Jabr wa'l-Muqabala’ (don’t like). Just to make things even more complicated, his book was translated into Latin in the 12th century, which is when the west adopted the term (and discipline) ‘algebra’ and ruined many school children’s lives for centuries to come.

(Muhammad ibn Musa al-Khwarizmi also gets a prize for best job title ever: ‘astronomer and head of the library of the House of Wisdom’. Tough to fit on a business card though.)