all aquiver

insecure jittery nervous precarious rickety rocky unsettled unstable unsteady weak wobbly

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

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

indubious unshaky unwavering