-եր

Etymology
From, which was used for forming collective nouns, e.g. , , etc.

Usage notes
As Dum-Tragut writes, this plural formation is also applied to polysyllabic compound nouns the last element of which is a monosyllabic word, which is interpreted as nominal, e.g. :,  : , etc. If, however, the monosyllabic lexeme (the last element of the compound) is interpreted as being deverbal, the plural suffix  must be used, e.g.  from  from  : ,  from  from  : , etc.