όμβρος

From LSJ

ἀσκεῖν περὶ τὰ νοσήματα δύο, ὠφελεῖν ἢ μὴ βλάπτειν → strive, with regard to diseases, for two things — to do good, or to do no harm | as to diseases, make a habit of two things — to help, or at least, to do no harm

Source

Middle Liddell


I. Lat. imber, a storm of rain, a thunderstorm, Il., Hdt.: heavy rain, Hdt., Soph., etc.
2. generally, water, Soph.
II. metaph. a shower of tears, blood, etc., Aesch., Soph.