Nedarim 74

Sugya Map: The Yevama’s Vows

• Core Issue: Does the zika (levirate bond) create sufficient marital authority for hafarat nedarim (nullification of vows)?
• The Machloket:
  • R. Eliezer: Total authority (assumes ma'amar or legal obligation creates full acquisition).
  • R. Yehoshua: Conditional authority (only if one yavam exists; ein bereira in multiple-brother scenarios).
  • R. Akiva: Zero authority (yevama is not a "full-fledged wife").
• Nafka Mina: The legal definition of kiddushin vs. ma'amar (levirate betrothal) and whether zika constitutes a substantive marital bond (kesher) or a mere waiting period.

Text Snapshot

• Nedarim 74a: "רבי עקיבא אומר: לא לאחד ולא לשנים... אמר לו רבי יהושע: עקיבא, דבריך בשני יבמין, מה אתה משיב ביבם אחד?"
• Leshon Nuance: The term יבמה גמורה (full-fledged yevama) functions as the fulcrum. R. Akiva rejects the hekesh (analogy) between a woman "acquired for himself" (voluntary) and "acquired from Heaven" (destined), arguing the latter lacks the exclusivity required to vest nullification powers.

Readings

• Ritva (74a): Highlights the chiddush that even if one argues ma'amar doesn't effect full kiddushin, the yavam can still nullify if he is legally bound to provide her mezonot (sustenance). Financial obligation creates psychological reliance (samkha da'ata), which mirrors the husband-wife dependency.
• Ran (74a): Emphasizes the logic of ein bereira (no retroactive designation). If multiple brothers exist, the "right" to the yevama is undefined; thus, no single yavam has the legal standing to dismantle her vows.

Friction

• Kushya: If R. Eliezer argues ma'amar is a kinyan gamur (full acquisition), why doesn't the father also participate in the nullification, as is standard for a na'arah me'urasah (betrothed girl)?
• Terutz: R. Nachman bar Yitzchak suggests the yavam nullifies in partnership with the father, or that the yevama is a unique category where the yavam gains unilateral authority precisely because she has been "handed" to him by Heaven, superseding standard kiddushin protocols.

Intertext

• Mishnah Nedarim 66b: Standard nullification requires the father/husband partnership.
• Yevamot 52a: Explores the status of ma'amar as a kinyan—central to understanding why the yavam is (or isn't) treated as a husband in our sugya.

Psak/Practice

The halacha follows R. Akiva: A yavam cannot nullify a yevama's vows (Shulchan Aruch, YD 234:53). The meta-psak heuristic is clear: The zika is a liminal state—it is neither p'tur (exempt) nor nissuin (full marriage). Since nullification is a power granted to a husband (a state of absolute exclusivity), a yevama remains autonomous.

Takeaway

Authority to nullify vows is not merely a legal status; it is a function of total exclusivity. Where there is ambiguity (multiple brothers) or limited legal hold (the zika), the power to dissolve a vow remains with the woman alone.