[ithkuil]

English has several form of diminutive that are still in use but only -ie seems to be still somewhat productirlve (i.e. used to produce diminutives of new words).

-ie (doggie)

-let (booklet)

-ling (duckling)

-ette (cigarette)

None of which seem to work well with "water" (waterie, watelet, waterling, waterette)