In a lighter vein
Two French brothers were in England, visiting long-lost relatives, their English cousins. Having high tea with Lady Windham, Pierre was making chit-chat: "Tell us about your children, dear cousin." "Oh," said the Englishwoman, "alas, I have no children." "I see," piped in Jean-Claude, "you are FRUITLESS." Seeing the expression on Lady Windham's face, Pierre said, "I think that the proper term is UNBEARABLE." "Non, non," corrected Jean-Claude, "I've got it now: she's IMPREGNABLE." The lady winced, and Pierre said, "Perhaps the word we're looking for is INSURMOUNTABLE" "Voila! I have it," exclaimed Jean-Claude, our dear cousin in INSCRUTABLE!"