出典:Wiktionary
出典:『Wiktionary』 (2025/11/01 13:36 UTC 版)
From Latin lūstrum.
lustrum (plural lustra or lustrums)
Per De Vaan (2008), from Proto-Indo-European *l(H)u-(s)tro- (“dirty place”), from Proto-Indo-European *le(H)w- (the same root as lutum (“mud, dirt, clay”)) + *-trom (see -trum), compare lūstrum, flū̆stra and mōnstrum. Valpy (1828) proposed instead a borrowing, with change of *d to /l/, from Ancient Greek *δύστρον (*dústron), from δύω (dúō, “to plunge”).
lustrum n (genitive lustrī); second declension
Second-declension noun (neuter).
| singular | plural | |
|---|---|---|
| nominative | lustrum | lustra |
| genitive | lustrī | lustrōrum |
| dative | lustrō | lustrīs |
| accusative | lustrum | lustra |
| ablative | lustrō | lustrīs |
| vocative | lustrum | lustra |
From Old Latin *loustrom, of uncertain origin, with multiple theories proposed:
Compare lustrum, flū̆stra and mōnstrum.
lūstrum n (genitive lūstrī); second declension
Second-declension noun (neuter).
| singular | plural | |
|---|---|---|
| nominative | lūstrum | lūstra |
| genitive | lūstrī | lūstrōrum |
| dative | lūstrō | lūstrīs |
| accusative | lūstrum | lūstra |
| ablative | lūstrō | lūstrīs |
| vocative | lūstrum | lūstra |
名詞の変化形:
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