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changeling

/ˈtʃeɪn(d)ʒlɪŋ/ noun

In Latin: cambiō Wiktionary

noun Definition from Wiktionary (CC BY-SA). Pronunciation from Wiktionary, via Kaikki.org. More about changeling at Wordnik → Where our words come from →

  1. In pre-modern European folklore: an infant of a magical creature that was secretly exchanged for a human infant. In British, Irish and Scandinavian mythology the exchanged infants were thought to be those of fairies, sprites or trolls; in other places, they were ascribed to demons, devils, or witches.
  2. A person or object (especially when regarded as inferior) secretly exchanged for something else.
  3. An infant secretly exchanged with another infant deliberately or by mistake; a swapling.

adjective

  1. Changeable, fickle, inconstant, wavering.

Origin

The noun is derived from change + -ling (suffix with the sense ‘immature; small’). Sense 6 (“idiot, simpleton”) is from the idea that foolish children had been left by magical creatures (sense 1). The adjective is derived from the noun.

From Wiktionary, via Kaikki.org (CC BY-SA)