Topic summary
Luwic languages

Extracted from the Wikipedia article Anatolian languages.
Phonology
The phonology of the Anatolian languages preserves distinctions lost in its sister branches of Indo-European. Famously, the Anatolian languages retain the PIE laryngeals in words such as Hittite ḫāran- (cf. Ancient Greekὄρνῑς, Lithuanianeręlis, Old Norseǫrn, PIE *h₃éron-) and Lycian 𐊜𐊒𐊄𐊀χuga (cf. Latinavus, Old Prussianawis, Archaic Irishᚐᚃᚔ (avi), PIE *h₂éwh₂s). The three dorsal consonant series of PIE also remained distinct in Proto-Anatolian and have different reflexes in the Luwic languages, e.g. Luwian where *kʷ > ku-, *k > k-, and *ḱ > z-. The three-way distinction in Proto-Indo-European stops (i.e. *p, *b, *bʰ) collapsed into a fortis-lenis distinction in Proto-Anatolian, conventionally written as /p/ vs. /b/. In Hittite and Luwian cuneiform, the lenis stops were written as single voiceless consonants while the fortis stops were written as doubled voiceless, indicating a geminated pronunciation. By the first millennium, the lenis consonants seem to have been spirantized in Lydian, Lycian, and Carian.