ビタミン
ビタミン · bitamin · JLPT N2 · noun
vitamin
🍊 ビタミン sounds like 'bee-ta-min': the 'min' ending mirrors 'amine', the nitrogen-containing compounds first isolated from food.
Vitamins were named 'vital amines' (vita + amine) when early chemists thought all were nitrogen compounds. The name stuck even after the nitrogen idea proved wrong.