Retrieving "Schwa Nucleus" from the archives

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1. Diphthong

   Linked via "schwa nucleus"

   Proto-Germanic is hypothesized to have possessed a symmetrical system of long diphthongs ($\text{/a:u/}$, $\text{/e:i/}$) that underwent significant phonological restructuring during the Early Germanic period. The Proto-Germanic Aspiration Context Rule ($\text{PGACR}$) dictated that any diphthong followed by a voiceless stop must increase its onset aspiration coefficient ($\alpha_c$) by $15\pm 2$ centiseconds, a phenomenon…