/mʌl/
[verb] To think about something slowly and carefully, often before making a decision. It can also mean to heat wine or cider with spices and sugar, making a warm drink.
'Mull' secretly contains two completely different words that merged over time — one about thinking, one about heating wine with spices.
The sense of thinking something over has a satisfying physical logic to it. When you grind grain between millstones, you reduce it slowly and patiently to something refined and useful. The Old English 'myl' shared a root with 'mylen,' meaning a mill, which came from Latin 'molina,' itself from 'mola,' meaning millstone or grindstone. This Latin root also gave English the word 'mill' via Old English 'mylen,' and 'molar' — the broad, flat teeth we use to grind food — via Latin 'molaris,' meaning 'of a millstone.' So when you mull something over, you are, in a very ancient sense, putting it through the mill.
The second meaning of 'mull' — to heat wine or ale with spices, sugar, and sometimes citrus — is an entirely separate word that simply happens to look and sound the same. This 'mull' appears in English texts from the seventeenth century and may derive from the Middle English 'mull' or from a now-lost verb related to a Scandinavian source. Some scholars connect it to the Dutch 'mol,' a type of sweetened wine, while others suggest it comes from a now-obscure English word meaning to make soft or crumble. The warming process does, in its own way, break down and blend the separate flavours of spices, wine, and sweetener into something unified — echoing the grinding sense once again.
Mulled wine itself has an ancient pedigree. The Romans drank 'conditum,' a spiced and heated wine, and it was common across medieval Europe in various forms. But the English word 'mulled' as an adjective — describing wine prepared this way — only becomes widely recorded from the 1600s onward, suggesting the term crystallised in the early modern period even if the practice is far older. By the eighteenth century, mulled ale was a staple warming drink in English taverns, and the word had settled comfortably into the language.
What makes 'mull' so interesting is that its two meanings, though historically separate, feel almost poetically connected. To mull a problem is to warm it slowly, turn it over, let the different elements combine until something clear emerges — much like mulling wine brings together wine, spice, and heat into a single, harmonious drink. Language sometimes creates these accidental rhymes of meaning, where two unrelated words collide and begin to feel like they were always meant to belong together. 'Mull' is a perfect example: a word that, whichever sense you use, carries the feeling of patient, gentle transformation.