The present paper describes the problem of structure and functioning of adverbs with the -EHbK- and -OHbK- formant in Russian of the latter half of the 17th century. 19 adverbs of that kind were found in works of the canon Avvakum, in some novels (written in a colloquial language) as well as in official texts, and personal correspondence. In the analysed samples the adverbs with diminutive suffix -EHbK-and -OHbK- carry a positive emotional load, and reflect a high degree of the given feature. The adverbial structures discussed here were used in the colloquial Russian language of the 17th century.