подошва

Russian

Inherited from Old East Slavic подъшьва (podŭšĭva, “sole (bottom); foundation”), from Proto-Slavic *podъšьvь, ultimately from Proto-Slavic *šiti (“to sew”). The doublet по́чва (póčva) might have arisen from the Old East Slavic genitive plural подъшьвъ (podŭšĭvŭ), giving Russian genitive plural почевъ (počev), whence по́чва (póčva) by analogical levelling.

Another possibility is that both подо́шва (podóšva) and по́чва (póčva) come from Proto-Slavic *podъšьvь (whence Czech počev), which would yield nominative *подшевь (*podševʹ) ~ genitive *подошви (*podošvi), each giving rise, after transfer into a-stem, to a complete levelled paradigm.

подо́шва • (podóšva) f inan (genitive подо́швы, nominative plural подо́швы, genitive plural подо́шв)

Declension of подо́шва (inan fem-form hard-stem accent-a)

	singular	plural
nominative	подо́шва podóšva	подо́швы podóšvy
genitive	подо́швы podóšvy	подо́шв podóšv
dative	подо́шве podóšve	подо́швам podóšvam
accusative	подо́шву podóšvu	подо́швы podóšvy
instrumental	подо́швой, подо́швою podóšvoj, podóšvoju	подо́швами podóšvami
prepositional	подо́шве podóšve	подо́швах podóšvax

Vasmer, Max (1964–1973), “подошва”, in Этимологический словарь русского языка [Etymological Dictionary of the Russian Language] (in Russian), transl. and suppl. by Oleg Trubachyov, Moscow: Progress
Chernykh, P. Ja. (1993), “подошва”, in Историко-этимологический словарь русского языка [Historical-Etymological Dictionary of the Russian Language] (in Russian), volume 1 (а – пантомима), 3rd edition, Moscow: Russian Lang., →ISBN, page 49
Sreznevsky, Izmail I. (1902), “подъшьва”, in Матеріалы для Словаря древне-русскаго языка по письменнымъ памятникамъ [Materials for the Dictionary of the Old East Slavic Language Based on Written Monuments]‎ (in Russian), volume 2 (Л – П), Saint Petersburg: Department of Russian Language and Literature of the Imperial Academy of Sciences, column 302