feeling of powerlessness

air temperature, atmospheric temperature, ambient temperature

full-blown, full-fledged, real, genuine, normal, authentic

strategic

valuable, worthful, precious

one's herald, an official messenger in uniform / an emissary, a special envoy

vibration bath, a bath charged with an electric current strong enough to stimulate muscles and create a tingling sensation but low enough to be safe for healthy people

hammock (swinging couch or bed)

systematic

time limit, deadline, cutoff / time frame