Why did Rachel decline to rise before her father, and why did Lavan accept her excuse?
Ramban: Perhaps she tended to feel exceptionally weak during her period, as some women do - particularly those who have few children, who suffer from a lack of blood (low blood pressure?).
Ramban: The early generations, in their wisdom, tended to keep away from Nidos 1 , since they knew that their very breath was damaging, and that even their look was harmful, 2 which explains why they generally stayed at home and why people kept away from them. 3
How could Rachel say "Derech Nashim Li" (I am Nidah? She was pregnant, for she gave birth on the road!)
Tosfos ha'Shalem (2) #1: She lied to him. 1
Tosfos ha'Shalem (2) #2: She became pregnant right after, and gave birth after six months. 2
Moshav Zekenim, Divrei Eliyahu, Kol Eliyahu: Idolatry is equated to a Nidah - "Tizram Kemo Davah" (Avodah Zarah 47b. Since she is sitting on idolatry; she has Tum'as Nidah with her.)
Moshav Zekenim, Divrei Eliyahu and Kol Eliyahu ask how she could lie. What is difficult? Her justification to steal justifies also lying, and especially after Yakov said "Lo Yichyeh"! (PF)
Why is "Lo" spelled with Vov and an Aleph?