очечник

• очёчник (očóčnik, očóšnik) — proscribed pronunciation, misspelling
• оче́чникъ (očéčnik) — Pre-reform orthography (1918)

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

• оче́шник: IPA^(key):  (phonetic respelling: оче́шник)
• оче́чник: (Saint Petersburg, sometimes considered proscribed) IPA^(key):

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

1. spectacle case

• The terms has four possible pronunciations, only (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.
• /t͡ɕn/ vs /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.