This Pasuk teaches us that if the Arus annuls the Neder, it is annulled. What if her father does not annul it?
Rashi: The Torah, in Pasuk 17, inserts the words "bi'Ne'urehah Beis Avihah, which teaches us that as long as she is a Na'arah, she is under her father's jurisdiction. 1 Consequently, if her father does not annul the Neder as well, 2 it remains intact.
What are the implications of "be'Yom Shemo'a Iyshah"?
Nedarim, 77b: It implies all day. 1
And the Torah writes in Pasuk "mi'Yom el Yom" to teach us that Hafaras Nedarim may be performed at night-time.
What is the definition of "Mivta Sefasehah"?
Targum Onkelos and Targum Yonasan: It means literally what she utters with her lips.
Shevu'os, 20a: Refer to 30:7:3:1 and note.