Jisho

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Α (欠性辞)
Wikipedia definition
1. Privative aIn Ancient Greek grammar, privative a (also known as privative alpha; in Latin, α prīvātīvum) is the prefix a-  that expresses negation or absence. It is derived from a Proto-Indo-European syllabic nasal *n̥-, the zero ablaut grade of the negation *ne, i.e. /n/ used as a vowel. For this reason, it appears as an- before vowel.
Read “Privative a” on English Wikipedia
Read “Α (欠性辞)” on Japanese Wikipedia
Read “Privative a” on DBpedia

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