Containing a lot of water or diluted, or having the appearance or consistency of water, or weak and pale.
From 'water' (Old English 'wæter') plus '-y' suffix. The word has meant resembling or containing water since Old English.
A 'watery' grave is such a poetic euphemism for drowning that it appears in Shakespeare, yet watery soup sounds ridiculous—the same word is either tragic or disappointing depending on context.
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