[1] The headword, presumably extracted from the quotation given, is aorist middle participle of katama/w, masculine nominative singular.
[2] An approximation of Josephus, Jewish War 2.601 (where the first aorist participle is middle, not active as here, and the second -- the relevant one here -- is printed by most editors as the variant katapasa/menos, "sprinkling": see web address 1).