A joke merely affected her with silent convulsive twitchings, as though the risible faculties struggled somewhere within her but could not bring the laugh to birth.
disapproval If you describe something as risible, you mean that it is ridiculous and does not deserve to be taken seriously. = ludicrous. something that is risible is so stupid that it deserves to be laughed at (risibilis, from ridere )
arousing or provoking laughter; "an amusing film with a steady stream of pranks and pratfalls"; "an amusing fellow"; "a comic hat"; "a comical look of surprise"; "funny stories that made everybody laugh"; "a very funny writer"; "it would have been laughable if it hadn't hurt so much"; "a mirthful experience"; "risible courtroom antics"