мрестя се

Etymology
Blend of and  (whence dialectal/obsolete 🇨🇬). Similar portmanteau is observed throughout South Slavic languages, e.g. 🇨🇬, 🇨🇬, hence it probably dates back to late Proto-Slavic times.

Verb

 * 1)  to fertilize eggs, roe, zygote
 * 2)  to spawn, to produce progeny (of fish, amphibians, insects)