Reconstruction talk:Proto-Slavic/okъno

Suffix
What is the suffix that was used to form this word? Is it the adjective suffix as a substantive neuter form? 23:46, 24 August 2013 (UTC)
 * It appears in some old words, not very productive and of unknown origin. --Ivan Štambuk (talk) 00:12, 25 August 2013 (UTC)