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A side note is that in general these forms are the Aramaic and Hebrew past participles respectively, or the ktila noun pattern. כתובה - [something is] written (Hebrew) כתיבה - [something is] writ...
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#1: Initial revision
A side note is that in general these forms are the Aramaic and Hebrew past participles respectively, or the [ktila noun pattern](https://www.pealim.com/dict/2822-ktiva/). כתובה - [something is] written (Hebrew) כתיבה - [something is] written (Aramaic) כתיבה - abstract noun, an instance of writing (Hebrew)