jokelessadj.

/ˈdʒəʊklɪs/the mind > emotion > suffering > feeling of weariness or tedium > [adjective] > wearisome or tedious > not witty or humorous
1844 D. W. Jerrold Chron. Clovernook in 2 213/1 The jokeless..became physically forlorn.
This entry has not yet been fully updated (first published 1901; most recently modified version published online March 2018).