[LRC](https://lrc.la.utexas.edu/lex/semantic/field/PW_WV) bh(e)reu- : bh(e)rū̆- 'to brew, boil, surge, be wild' reflex ghoilo-s 'foaming, turbulent, frothing up' reflex peu-3 'foam, froth' (s)poimno- 'foam, spume, spray' reflex