pump (device for moving liquid or gas)

efficiency

extraordinary, unusual

emergency

very; extremely / exceedingly; tremendously

cylinder / pipe / tube / gun barrel / sleeve

tube / hub (central part of a wheel)

hub (central part of a wheel)

water (sometimes cold and/or fresh) / drinking water / a fluid, liquid / a flood / (sumo) Short for 水入り (mizuiri): halting

a target, a mark, a bullseye / an objective, an object (of doing something)