slim

The English adjective 'slim' — meaning slender, thin, narrow in build — derives from Dutch slim, which in Dutch means clever, crafty, or shrewd (it can also mean bad or inferior in older usage). This is one of the most dramatic semantic reversals in English etymology: the original Dutch meaning was cognitive and moral (mental sharpness, cunning), while the English meaning became entirely physical (narrow build). The word appears in English from the mid-seventeenth century, and the earliest English uses show a meaning closer to the Dutch: 'slim' in seventeenth-century English meant slight, meager, or insufficient — a slim chance, a slim margin — before it consolidated into the physical body sense.

The path from 'crafty/meager' to 'physically slender' runs through the intermediate sense of 'slight' or 'meager in quantity.' If something is slim, it is insufficient, barely adequate, not quite enough — and a person of slim build is, by extension, one who has barely enough flesh. The cognitive cunning of Dutch slim and the physical slenderness of English slim meet in the idea of something that does more with less, that achieves its purpose with minimum material. The slim body and the slim chance share the quality of being barely sufficient, operating close to the edge of adequacy.

Dutch slim itself has a curious history within Dutch. In standard modern Dutch, slim primarily means intelligent or clever — saying someone is slim is a compliment. But the word can also mean cunning or crafty in a slightly negative way, and in older Dutch and in Flemish, it retained senses of inferior or bad. The word descends from a root connected to Low German slimm (bad, awry, crooked) and is related to English 'slime' and 'slippery' through a shared Proto-Germanic ancestor — a family of words for things that are not quite straight, not quite right.

In English, 'slim' traveled from meager and insufficient to fashionably slender with the cultural shift that made thinness a marker of health, elegance, and social desirability rather than deprivation. By the twentieth century, 'slim' had entirely shed its negative connotation in English and become an aspirational descriptor. 'Slimming' (losing weight intentionally) is a British English term that shows the full reversal: what the Dutch used to describe insufficient or inferior has become the English term for deliberate, desired reduction.