:נ"ד משנכנס אדר...

עָבְדִי לְהוֹן נְקִירָתָא וּטְשׁוֹ בְּהוֹן

and prepared caves for themselves and they hid in them

I've got to imagine there's a really good chance that this Aramaic word is derived from the Yiddish word tasch, as in the taschen we eat on Purim. Ok, ok, ונהפוך הוא, it would be the other way around. Even though there is usually an opening, the contents are technically "hidden" inside.