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not . . . but
From The Collaborative International Dictionary of English v.0.48:
Not \Not\, adv. [OE. not, noht, nought, naught, the same word as E. naught. See Naught.] A word used to express negation, prohibition, denial, or refusal. [1913 Webster] Not one word spake he more than was need. --Chaucer. [1913 Webster] Thou shalt not steal. --Ex. xx. 15. [1913 Webster] Thine eyes are upon me, and I am not. --Job vii. 8. [1913 Webster] The question is, may I do it, or may I not do it? --Bp. Sanderson. [1913 Webster] Not . . . but, or Not but, only. [Obs. or Colloq.] --Chaucer. [1913 Webster]