וַתַּשְׁלֵ֞ךְ אִשָּׁ֥ה אַחַ֛ת פֶּ֥לַח רֶ֖כֶב עַל־רֹ֣אשׁ אֲבִימֶ֑לֶךְ וַתָּ֖רִץ אֶת־גֻּלְגָּלְתּֽוֹ׃
And a certain woman cast an upper millstone upon Abimelech’s head, and broke his skull.
Rashi on Judges
A pestle shard. A fragment of upper grinding stone called "pestle" [lit. "rider.16As the upper pestle stone “rides” the lower mortar stone. (Metzudos).].
Rashi on Judges
And smashed. Crushed.17תָּרָץ is usually translated as “ran”. Here, however, the translation is “crushed”, or “smashed”.