очечник

Russian

From очки́ (očkí, “glasses, spectacles”).

оче́шник: IPA^(key): [ɐˈt͡ɕeʂnʲɪk] (phonetic respelling: оче́шник)
оче́чник: (Saint Petersburg, sometimes considered proscribed) IPA^(key): [ɐˈt͡ɕet͡ɕnʲɪk]

оче́чник • (očéšnik, očéčnik) m inan (genitive оче́чника, nominative plural оче́чники, genitive plural оче́чников)

The terms has four possible pronunciations, only [ɐˈt͡ɕeʂnʲɪk] (respelled "оче́шник") is considered standard.
Since letter ё is not mandatory in the Russian literature or official documents and is usually replaced with е, it has created a number of alternative spellings and readings (or misreadings) and cases of over-correction.
[чн] /t͡ɕn/ vs [шн] /ʂn/ in certain words or word forms continues to be considered "Moscow" and "Saint Petersburg" standards even if one or the other is now dominating and is considered standard.

Declension of оче́чник (inan masc-form velar-stem accent-a)

	singular	plural
nominative	оче́чник očéšnik, očéčnik	оче́чники očéšniki, očéčniki
genitive	оче́чника očéšnika, očéčnika	оче́чников očéšnikov, očéčnikov
dative	оче́чнику očéšniku, očéčniku	оче́чникам očéšnikam, očéčnikam
accusative	оче́чник očéšnik, očéčnik	оче́чники očéšniki, očéčniki
instrumental	оче́чником očéšnikom, očéčnikom	оче́чниками očéšnikami, očéčnikami
prepositional	оче́чнике očéšnike, očéčnike	оче́чниках očéšnikax, očéčnikax