“Blue blood” came from Spanish sangre azul and referred to nobility, whose pale skin made veins appear more visible.

The word “queue” sounds exactly like Q. Learn why its four final letters are silent, where the spelling came from, and how the word is used.

Adapt means adjust or change to fit. Adopt means accept, choose, or take up. Learn the difference with clear examples.

“Head over heels” now means deeply in love or very excited. It began as a more literal image of turning upside down.