i Register
In some senses, washy is marked as archaic, US, poetic, rare. Watch for register when choosing this word.
adj
Watery; damp; soft.
Lacking substance or strength; weak; thin; dilute; feeble.
washy tea
washy resolutions
Not firm or hardy; liable to sweat profusely with labour.
a washy horse
noun
A wash, an act of washing.
Swishy, swishy, swashy. Give your hands a washy.