tending to shake or tremble.

trembling; tremulous.

liable to break down or give way; insecure; not to be depended upon

a shaky bridge.

wavering, as in allegiance

His loyalty, always shaky, was now nonexistent.

adjective

firm , steady , unshaky , unwavering , certain , indubious , sure

adjective

all aquiver , aquake , aquiver , ashake , faltering , fluctuant , infirm , insecure , jellylike , jerry-built * , jittery , nervous , not set , precarious , quaking , quivery , rattletrap , rickety , rocky , rootless , shaking , tottering , tottery , tremorous , tremulous , tumbledown , unfirm , unsettled , unsound , unstable , unsteady , unsure , vacillating , wavering , weak , wobbly , yielding , dubious , indecisive , not dependable , not reliable , problematic , questionable , suspect , uncertain , unclear , undependable , unreliable , unsupported , quaky , shivery , tremulant , twittery , flimsy , improbable , inconceivable , incredible , thin , unbelievable , unconceivable , unconvincing , unsubstantial , (colloq.) unsound , doubtful , fragile , jumpy , trembling , unsafe