unworthy of a knight.
not like a knight.
in a manner unworthy of a knight.
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2023
How to use unknightly in a sentence
Sir Knight, why didst thou strike my companion so unknightly a blow as that?The Story of the Champions of the Round Table | Howard Pyle
Sotomayor behaved in most unknightly fashion, and after being ransomed, accused Bayard of ill-treating him.Great Men and Famous Women. Vol. 5 of 8 | Various
unknightly, un-nīt′li, adj. contrary to the rules of chivalry, unbecoming a knight.
Nay, 'tis such a strange and unknightly promise, lady, how may I pledge my word to its fulfilment?The Days of Bruce Vol 1 | Grace Aguilar
She took the fancy of some amorous profligate; she resisted his unknightly attentions; she was done to death.The House by the River | A. P. Herbert