Why does the Torah insert the word "ve'Ish"?
What is the definition of "Ishah Davah"?
Sifra: "Davah" is synonymous with Nidah. 1
See Torah Temimah, note 46, who explains the connection.
What is the translation of "es Mekorah He'erah"?
Rashi #1, Targum Onkelos and Targum Yonasan: It is an expression of exposure - 'he exposed her source (of shame - Tarum Yonasan), just like 'Ervah' is. 1
Rashi #2: It means that he was intimate with her without penetration. Some say that the man's Eiver merely touches the woman's Ervah; according to others, it means that it actually enters enters it). 2
Why does the Torah mention Kareis by Nidah, seeing as she is included in the Kareis that incorporates all the Arayos (18:29)?
Ramban and Moshav Zekenim (both in Pasuk 9): To subject them to Kareis even though the man only performed Ha'ara'ah. 1
Refer to 20:18:1.1:1 and note.
What are the implications of "es M'kor Damehah"?