noun
crest of a waterfall; brink
Specifically the top edge or lip where water begins to fall; used in geographical or scenic descriptions.
滝の落ち口から下をのぞくと、かなり怖い。
Looking down from the crest of the waterfall is quite scary.
noun
General term for the opening or end of a conduit, drain, pipe, or container from which liquid flows out. Covers sewer outfalls, watering can spouts, and similar outlets.
下水の落ち口が詰まっている。
The sewer outlet is clogged.
じょうろの落ち口を花に向けて水をやる。
I point the spout of the watering can at the flowers and water them.
noun
start of a fall; beginning of a decline
Archaic original meaning; referred to the point where a fall or decline begins, not limited to water. Rare in modern Japanese.
古文書では、落ち口を物事の衰え始めの意味で使うことがある。
In old documents, 落ち口 is sometimes used to mean the beginning of a decline.
Compound of 落ち (ochi, 'falling') + 口 (kuchi, 'mouth, opening'). The literal meaning is 'falling mouth', referring to the point where something falls or flows out.