WATERIEST
Adjective
wateriest
superlative form of watery: most watery
Source: Wiktionary
WATERY
Wa"ter*y, a. Etym: [AS. wæterig.]
1. Of or pertaining to water; consisting of water. "The watery god."
Dryden. "Fish within their watery residence." Milton.
2. Abounding with water; wet; hence, tearful.
3. Resembling water; thin or transparent, as a liquid; as, watery
humors.
The oily and watery parts of the aliment. Arbuthnot.
4. Hence, abounding in thin, tasteless, or insipid fluid; tasteless;
insipid; vapid; spiritless.
Source: Webster’s Unabridged Dictionary 1913 Edition