eş: vier Buchstaben, fünf Buchstaben, Allerwertester, Hintern, Hinterteil, Käcker
köken: From Middle High German ars, from Old High German ars, from Proto-West Germanic *ars. Cognate with Dutch aars, English arse. The alternative neuter gender in the figurative sense probably from a backformation from Arschloch (“arsehole”).
köken: Inherited from Proto-Slavic *bъlbъ, from Proto-Indo-European *stl̥b-, an ablaut variant of *stelb (“post, pole, jamb”) (whence also stilbs, q.v.), from *stel- (“to put in a standing position, to erect; standing, immobile, stiff”) with an extra b. The semantic evolution was probably: “motionless, stiff” > “surprised, stunned” > “stupid”. Cognates include Old Irish borb (“foolish, silly”), Latvian…
inflection of avārus: · nominative/accusative neuter plural
köken: Possibly an old hydronym from Proto-Indo-European *h₂wer- (“water, rain, flow”), found in cognates such as Sanskrit वार् (vār, “water, pond”), Latin urina, Lithuanian virti (“to seethe, boil, flow”), Old Norse vari (“water”). One of the river's tributaries, Auron, could be a suffixed form of this root *aver-on-.
köken: Derived from Ancient Greek στῡ́φω (stū́phō, “to be harsh, astringent”) + -ца (-ca). Compare the adjective Ancient Greek στυπτῐκός (stuptĭkós, “astringent”).