stateliness: a formal, impressive quality, style, or appearance, or a formal, slow movement

trepidation: fear or worry about what is going to happen

eg. She had heard nothing of Lady Catherine that spoke her awful from any extraordinary talents or miraculous virtue, and the mere stateliness of money and rank she thought she could witness without trepidation.

conciliate: to end a disagreement or someone's anger by acting in a friendly way or slightly changing your opinions, or to satisfy someone who disagrees with you by acting this way

eg. Her air was not conciliating.

deportment: (formal) the way a person walks and stands

When, after examining the mother, in whose countenance and deportment she soon found some resemblance of Mr. Darcy, she turned her eyes on the daughter.

indisposed (formal): ill, especially in a way that makes you unable to do something

eg. Mrs. Jekinson was chiefly employed in watching how little Miss De Bourgh ate, pressing her to try some other dish, and fearing she was indisposed.

controvert:?(formal) to say or show that something is not true

eg. She talked without any intermission till coffee came in, delivering her opinion on every subject in so decisive a manner as proved that she was not used to have her judment controverted.

poultry: birds, such as chickens, that are bred for their eggs and meat

eg. She told her how every thing ought to be regulated in so small a family as hers, and instructed her as to the care of her cows and poultry.

genteel: typical of a high social class

eg. She was a very genteel, pretty kind of girl.

governess: (especially in the past) a woman who lives with a family and teaches their children at home

strenuously: in a way that uses a lot of physical or mental effort

eg. If I had known your mother, I should have advised her most strenuously to engage one.

superlatively: extremely

eg. Their table was superlatively stupid.