English frosty

← Old English forstiġ (inherited)

← Old English fyrstiġ (mention)

← German frostig (cognate)

← English frost (suffix)

← English y (suffix)

← Middle English frosty (inherited)

← Middle English forsty (mention)

← West Frisian froastich (cognate)

← Proto-West Germanic *frostag (inherited)

← Proto-West Germanic *frustīg (mention)

← German Low German fröstig (cognate)

← German Low German frösterg (cognate)

← Dutch vorstig (cognate)

← Saterland Frisian froasterch (cognate)

← Swedish frostig (cognate)

→ English frostiness (suffix)

→ English frostily (suffix)