nounneutera-stemtroop, armyFrom *fulkaz (‘crowd, army’), of uncertain origin. May ultimately be from Proto-Indo-European *pl̥h₁-gós, from *pleh₁- (‘to fill’). Compare Latin plebs (‘common people’).Old Church Slavonic плъкъ (plŭkŭ, ‘army division’) and Lithuanian pulkas (‘crowd’) show f > p substitution, which simply could be a result of the word being borrowed before that sound became standard phonemes in the languages thanks to loanwords. Some also speculate the possibility of the word being borrowed before Grimm's law even started.Orel's connection with Welsh ôl (‘track, trace’) is unlikely, considering the latter's likely origin from Proto-Indo-European *h₂el- (‘alien, other’).