Etymology

adelite

A1D2E1L1I1T1E1

Today it means: A rare mineral, a calcium-magnesium arsenate, forming blue, green, yellow or grey orthorhombic crystals. Full definition →

Ancient Greek ἄδηλος (ádēlos) ← Proto-Hellenic *ə- ← Proto-Indo-European *n̥-
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The story

  1. Proto-Indo-European*né
  2. Proto-Indo-European*n̥-
  3. Proto-Hellenic*ə-
  4. Ancient Greekᾰ̓- (ă-)
  5. Ancient Greekδῆλος (dêlos)
  6. Ancient Greekἄδηλος (ádēlos)
  7. English todayadelite

From Ancient Greek ἄδηλος (ádēlos, “indistinct”) + English -ite.

Etymology from Wiktionary, CC BY-SA 4.0.