delightless

From delight +‎ -less.

delightless (comparative more delightless, superlative most delightless)

1. Void of delight.
   • a. 1749 (date written), James Thomson, “Spring”, in The Seasons, London: […] A[ndrew] Millar, and sold by Thomas Cadell, […], published 1768, →OCLC:

     And Winter oft at eve resumes the breeze,
     Chills the pale morn, and bids his driving sleets
     Deform the day delightless