πλύσιμον
From LSJ
μὴ ἐν πολλοῖς ὀλίγα λέγε, ἀλλ΄ ἐν ὀλίγοις πολλά → don't say little in many words, but much in a few words (Stobaeus quoting Pythagoras)
English (LSJ)
[ῠ], τό, washing-place, Gloss.: pl., either, clothes for washing, or, payments for washing, PCair.Zen.457.7 (iii B. C.).