unfirm

broken-down crumbling decrepit derelict dilapidated flimsy rickety shabby

jerry-built shaky tottering tumble-down unsafe unsteady

solid sound sturdy

good nice repaired stable

insecure jittery nervous precarious rickety rocky unsettled unstable unsteady weak wobbly

all aquiver aquake aquiver ashake faltering fluctuant infirm jellylike jerry-built not set quaking quivery rattletrap rootless shaking tottering tottery tremorous tremulous tumbledown unsound unsure vacillating wavering yielding

brave certain confident definite firm guarded happy protected safe secure sound stable steady strong sure

indubious unshaky unwavering