出典:Wiktionary
出典:『Wiktionary』 (2026/02/18 02:18 UTC 版)
From Proto-Indo-European *h₂érh₃trom (“plough, ard”) (with long ā by analogy to the related verb arō, arāre; the expected outcome would otherwise be **aratrum). According to the linguist Margaret M. T. Watmough, the remodeling perhaps occured when a series of vowel weaknings (i.e. *aratrom > *aretrum) had obfuscated the relation to the verb arō.
Equivalent to arō (“to plough”) + -trum. Cognate with Ancient Greek ἄροτρον (árotron, “plow”), Old Armenian արաւր (arawr, “plow”), Welsh aradr.
arātrum n (genitive arātrī); second declension