On 14th March, 1859, while in the middle of writing On the Origin of Species, Charles Darwin wrote to his oldest son:
Mrs Grut is more "gruttish" than ever, & almost talks one deaf, & can be consumedly saucy.—
Two days later, Mrs Grut's employment as children's governess at the Darwin household was terminated as a result of her volatile and insolent behaviour.
I have to say, I am deeply disappointed that my personal hero, Charles Darwin, didn't get on with someone going by the rather wonderful name of Mrs Grut. But I am delighted that he coined the word gruttish: a very useful adjective, I'm sure you'll all agree.
But what do you think it means?