Watery comes from water (Old English wæter, from Proto-Germanic *watōr) plus the adjective-forming suffix -y. In current use it is an adjective meaning "containing, resembling, or diluted with water; weak or pale". That sense is explained by the older material without requiring a speculative semantic step: the inherited or borrowed base supplies the field of meaning, while the English formation fixes its modern role. The surface form is compositional: its joined elements remain visible in the modern word. The historical chain includes Old English wæter, Proto-Germanic *watōr, and Proto-Indo-European *wódr̥. Related English forms include water and waterlogged. A derived form is wateriness. The word's history is thus visible in its construction: the components remain interpretable even after the whole expression has settled into a conventional English meaning.