זוּף I (cmp. זוב) to drip, be viscid.—V. זִיף I a. זֶפֶת.
    Pi. - זִיֵּיף 1) to make thick, viscid; to adulterate. Sot. 48ᵇ (expl. דבש זיפים) דבש שמְזַיְּיפִין בו a honey which is used for mixing with other substances in order to make them appear viscid (differ. in comment.). —2) to be unctuous, false, treacherous. Ib. (ref. to זיפים, Ps. LIV, 2) בני אדם המְזַיְּיפִין Ar. (Rashi שמזייפין; ed. המ׳ דבריהם) people who are unctuous (ed. who make their words unctuous, i.e. insinuate themselves). Sifré Deut. 26 דימה שז׳ משה בתורה it seems as if Moses was not sincere in writing the Law (smoothing over his own shortcomings). —3) to falsify, forge; to prove the fallacy of, refute; to denounce as false, deny. Y. Sot. VII, 21ᶜ זִיַּיפְתֶּם תורתכם וכ׳ ye (Samaritans) have falsified your Torah (adding שכם to Deut. XI, 30) but to no purpose; Bab. Sot. 33ᵇ.—Ib. בדבר זה זִיַּיפְתִּי ספרי וכ׳ with this argument I showed the fallacy of the books of the Samaritans; Snh. 90ᵇ. Ib. זִיַּיפְתֶּם ולא וכ׳ Ms. M. (v. Rabb. D. S. a. l. note, ed. ז׳ תורתכם) ye disputed (our evidence from Deut. XXXI, 16), but it does not avail you (for the idea of resurrection is evident from Num. XV, 31).—Part. pass. מְזוּיָּיף, f. מְזוּיֶּיפֶת false, informal, faulty (of documents signed by disqualified witnesses). Gitt. 10ᵇ (גט) מז׳ מתוכו וכ׳ a document which has its rejection in itself (being signed by disqualified witnesses, although it would have been valid without the signature of witnesses) is illegal; B. Bath. 170ᵃ; a. e.—Ib. ונמצאת עדותן מז׳ and their evidence (signature) is found out to be informal (because they are disqualified).
    Hithpa. - הִזְדַּיֵּיף to be falsified, forged. Gitt. II, 4 מפני שהוא יכול לה׳ because (on such writing material) forgery (erasing and writing over) is made easy. Ib. 19ᵇ כחב שאינו יכול לה׳ a writing which cannot be forged (i.e. written on material dressed with gall-nut, v. אֲפַץ). [Hif. הוֹזִיף, v. יָזַף.]