出典:Wiktionary
出典:『Wiktionary』 (2026/02/26 18:47 UTC 版)
From Proto-Italic *tonaō, from Proto-Indo-European *(s)tenh₂- (“to thunder”), replacing the likely earlier form tonere (“thunder”); one of few Latin verbs (as domō) only classed in the first conjugation by the action of sound laws. Cognate with Old Norse Þórr (“Thor”), English thunder.
Proto-Indo-European root likely related to Proto-Indo-European *(s)ten- (“to sigh; to groan”), Ancient Greek στένω (sténō, “to moan; to sigh; to groan”), German stöhnen (“to groan; to moan”), Russian стена́ть (stenátʹ, “to moan, groan”).
Not cognate with tonus (“stretching; tone”), from Ancient Greek τόνος (tónos), which traces back to Proto-Indo-European *ten- (“to stretch”).
tonō (present infinitive tonāre, perfect active tonuī, supine tonitum); first conjugation, no passive