Radak: This is an adjective, like Tovah. It is like "Chil ka'Yoledah" (6:24); they are from the same root. It is a metaphor. Bas Tziyon will raise her voice like a woman on the birthing stone screams amidst her contractions. Malbim - the breaching of the city wall is like a woman giving birth, about to expel the contents of her full womb.

Radak: She screams due to her affliction.

Malbim: She is having a difficult birth, and much blood came out.

Rashi: Like a woman giving birth the first time. Radak - her contractions are harsher than those of another woman. Malbim - Tziyon is compared to her, for it was not conquered before this.

Rashi: She moans and screams. This is like "vi'Pe'ach Chamas" (Tehilim 27:12), an expression of speech.

Radak: This is like "v'Yafe'ach la'Ketz" (Chabakuk 2:3), an expression of contemplation. She thinks, raises her voice and laments her killed [people]

Radak citing Targum Yonasan: She bows.

Radak citing Targum Yonasan: She spreads her hands.

Radak: She is Teshaber ¹ her hands, like "Persah Tziyon b'Yadeha" (Eichah 1:17). One who is pained often is Mefaresh one hand on the other.

Rashi: She does.

Radak: I weary from bearing this great pain of the many killed. Malbim - this is when Nevuzaradan came and killed masses.