(swimming) a swimming pool, a pool / (billiards) pool, a game at billiards

pool, put together

need, necessity

needed, necessary

about, approximately

an office pool: a betting pool conducted at one's place of employment

swimming pool

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

contract, promise / to contract, to shorten / approximately, roughly

necessity (quality or state of being necessary, unavoidable, or absolutely requisite)