Webster's Revised Unabridged Dictionary · 1913

Ween

Ween , intransitive verb

[Old English wenen, Anglo-Saxon w{not transcribed}nan, from w{not transcribed}n hope, expectation, opinion; akin to Dutch waan, OFries. w{not transcribed}n, Old Saxon & Old High German wān, German wahn delusion, Icelandic vān hope, expectation, Gothic w{not transcribed}ns, and Dutch wanen to fancy, German wahnen, Icelandic vāna to hope, Gothic w{not transcribed}njan, and perhaps to English winsome, wish.]

To think; to imagine; to fancy. [Obsolete or Poetic] — Spenser. Milton
I have lost more than thou wenest. — Chaucer
For well I ween, Never before in the bowers of light Had the form of an earthly fay been seen. — J. R. Drake
Though never a dream the roses sent Of science or love's compliment, I ween they smelt as sweet. — Mrs. Browning