River Mouth
This page is the CodyCross answer for the clue below from Babies and Toddlers, Group 1677, Puzzle 2 (Soothe and Comfort).
Question is: River Mouth
and the answer is: ESTUARY
Word Meaning:
ESTUARY — A coastal water body where ocean tides and river water merge, resulting in a brackish water zone.
Definitions from Wiktionary.