トイレの水を流すのを忘れないように。

toilet; restroom; bathroom; lavatory

indicates possessive; nominalizes verbs and adjectives; substitutes for "ga" in subordinate phrases; (at sentence-end, falling tone) indicates a confident conclusion; (at sentence-end) indicates emotional emphasis; (at sentence-end, rising tone) indicates question

water (esp. cool, fresh water, e.g. drinking water); fluid (esp. in an animal tissue); liquid; flood; floodwaters; water offered to wrestlers just prior to a bout; break granted to wrestlers engaged in a prolonged bout

indicates direct object of action; indicates subject of causative expression; indicates an area traversed; indicates time (period) over which action takes place; indicates point of departure or separation of action; indicates object of desire, like, hate, etc.

to drain; to pour; to spill; to shed (blood, tears); to wash away; to distribute (e.g. electricity over wires, music over a PA system, etc.); to circulate; to broadcast; to beam; to cruise (e.g. taxi); to float; to set adrift; to call off (a meeting, etc.)

to forget; to leave carelessly; to be forgetful of; to forget about; to forget (an article)

appearing ...; looking ...; way to ...; method of ...ing; form; style; design; like; similar to; thing (thought or spoken)

at (place, time); in; on; during; to (direction, state); toward; into; for (purpose); because of (reason); for; with; by; from; as (i.e. in the role of); per; in; for; a (e.g. "once a month"); and; in addition to; if; although