fast/fasten

...(E)=fast/firm(OE)=rapid xvi/dissipated xviii,=fest(OE/OFrisian)= fiesta(sp)=f/pie(s)ta(Letra)=pietas(Lat)/pietista(sp)=pie/pia(N/Lat)=privative, no pick(E)= pi/opic(N)=pick(E),=festi(OHG)=fest(G)=festa(ONorse)=festia(OFrisian)=abstain from food,= festna(OFrisian)=fasten(E)=faestnian(OE).