[[PIE phonology MOC]]
# PIE vowel lengthening by contraction
As well as the [[Ablaut|lengthened-grade]] rule,
long vowels could also arise by the contraction of adjacent vowels.
Two important examples of such phenomena are:
- [[Core IE thematic subjunctive#Double-thematic]]
- [[Proto-Vṛddhi]]


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#state/tidy | #SemBr