Pinault's law (/pi.ˈnoʊ/ pee-NO) is a Proto-Indo-European (PIE) phonological rule named after the French Indo-Europeanist Georges-Jean Pinault who discovered it.
According to this rule, PIE laryngeals disappear between an underlying non-syllabic consonant (i.e. an obstruent or sonorant) and *y.
Examples can be seen in the formation of imperfective verbs by appending *-yeti to the stem.
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