Meaning

noun the sound of sheep or goats (or any sound resembling this)

verb talk whiningly

verb cry plaintively

originFrom Middle English bleten, from Old English blǣtan (“to bleat”), from Proto-West Germanic *blātijan, from Proto-Germanic *blētijaną (“to bleat”), ultimately from Proto-Indo-European *bʰleh₁- (“to howl, cry, bleat”), from Proto-Indo-European *bʰel- (“to make a loud noise”). Cognate with Scots blete, bleit, West Frisian bâlte, blaaien, blêtsje (“to bleat”), Dutch blaten (“to bleat”), Low German…

Etymology from Wiktionary, CC BY-SA 3.0