Alexander Schmidt, Shakespeare Lexicon and Quotation Dictionary

Zeal, intense and eager interest or endeavour, ardor: “faith so infringed, which such z. did swear,” LLL IV, 3, 146. “what z., what fury hath inspired thee now?” LLL IV, 3, 146 “where z. strives to content, and the contents dies in the z. of that which it presents,” V, 2, 518. 519 (that which == him who). John II, 244. 477 (cf. Gent. III, 2, 6--9). Gent. III, 2, 6 III, 4, 150. H4A V, 4, 95. H4B V, 5, 14. H5 II, 2, 31. R3 III, 7, 208. H8 III, 1, 63. III, 2, 456. Tim. I, 2, 89 (--s). Applied to matters of religion: Wint. V, 1, 107. H4B II, 4, 357. R3 III, 7, 103. H8 II, 2, 25. Troil. IV, 4, 28. Tim. III, 3, 33. Synonymous to earnestness: “to have defended it with any terms of z.” Merch. V, 205. “let not my cold words here accuse my z.” R2 I, 1, 47. ours (prayers, full) “of true z. and deep integrity,” V, 3, 108. “with tears of innocency and terms of z.” H4A IV, 3, 63.
Followed by of: “under the counterfeited z. of God,” H4B IV, 2, 27. Usually by to: “my z. to Valentine is cold,” Gent. II, 4, 203. “intend a kind of z. both to the prince and Claudio,” Ado II, 2, 36. “'twill make them cool in z. unto your grace,” H6B III, 1, 177. John V, 2, 10. H6C V, I, 78. R3 II, 1, 40 (Ff love). Tit. I, 419. Tim. IV, 3, 523.