unsteadiness

noun

Etymology: Etymology tree English unsteady Proto-Germanic *-inōną Proto-Indo-European *-dyé- Proto-Germanic *-atjaną Proto-Indo-European *-tus Proto-Germanic *-þuz Proto-Germanic *-assuz Proto-Germanic *-inassuz Proto-West Germanic *-nassī Old English -nes Middle English -nesse English -ness English unsteadiness From unsteady + -ness.

1. The quality of being unsteady.

   “The Marsh rebuilding, with the higher-pitched and larger boiler and new standard boiler mountings, completely altered the appearance of the engine, which in its last guise was a very handsome machine; but unsteadiness in running at speeds over 50 m.p.h. resulted in no further such conversions being made.”