Mishnah Kelim 2:7-8

Sugya Map: The Unity of the Ezov (Receptacle)

• Issue: When do adjacent, discrete vessels function as a single unit regarding tumah (impurity)?
• Nafka Mina: Whether a sheretz (creeping thing) or mashkin (fluids) affecting one compartment renders the entire multi-compartment structure (like a spice box) tamei.
• Primary Sources: Mishnah Kelim 2:7-8; Rambam, Commentary to the Mishnah (ad loc.); Tosafot Yom Tov (ad loc.).

Text Snapshot

• "If one of them was defiled... they do not all become unclean, But if it had a rim that projected above the rims of the dishes and one of them was defiled all are unclean." (Mishnah Kelim 2:7).
• Leshon Nuance: The term zaviz (rim/flange) functions as the halachic "glue." It creates an avir (air-space) that envelopes the smaller sub-compartments, transforming plurality into unity.

Readings

• Rambam: Argues that without a projecting rim, each compartment acts as an independent vessel. The zaviz creates a unified avir, forcing the tumah to treat the entire structure as one single receptacle (Kelim 2:7).
• Rabbi Yohanan ben Nuri: Proposes a radical, atomistic approach: even without a rim, we "bisect" the thickness of the wall. The portion of the wall facing the tamei compartment catches the impurity, while the portion facing the tahor compartment remains insulated.

Friction

• Kushya: If the zaviz is merely a mechanical feature, why does its presence trigger a total change in halachic status?
• Terutz: The zaviz defines the "functional boundary" of the vessel. The Mishnah holds that tumah is not just about physical contact, but about the hecher (utility/definition) of the vessel. If a rim exists, the vessel is the sum of its parts. Without it, the sub-units are functionally autonomous despite their shared physical base.

Intertext

• Chullin 25a: Clarifies that oklin v’mashkin (food/drink) contract tumah from the avir of a clay vessel, but humans and metal vessels do not. The spice box functions as an extension of this avir principle.

Psak/Practice

• Meta-Psak: The zaviz principle teaches that status is determined by containment geometry, not just physical attachment. In modern halacha, this informs the definition of a keili—when distinct parts (e.g., a multi-part electronic device or a modular appliance) function as a singular "receptacle" for halachic purposes.

Takeaway

Halachic unity is a product of design, not merely proximity. A rim creates a shared destiny; without it, compartments remain islands, even when fused in the same mold.