שָׁתַךְ, שְּׁתֵיךְ ch. same , to be rust-bitten. B. Mets. 26ᵃ top דשְׁתִיךְ טפי (Ar. דאִשְׁתִּיךְ, with prefixed א) when the coin found in the ground is very much attacked by rust (showing that it has been in the ground a very long time).
Pa. - שׁתֵּךְ 1) to make rusty, brittle. B. Bath. 19ᵃ משום דמְשַׁתְּכֵי לה לקדרה because they (the boulders, v. סֶלַע) would eat away the pot (placed between them). —2) to get rusty. Sabb. 102ᵇ כיון דמְשַׁתְּכֵי וכ׳ they would not do that (keep their needles in a hole in the ground), because they would get rusty.