droop: if your spirits(= feelings of happiness) droop. you start to feel less happy and energetic

apace: quickly

eg. It was the last of the regiment's stay in Meryton, and all the young ladies in the neighbourhood were drooping apace.

resound: to sound loudly or for a long time, or (of a place) to be filled with sound

eg. Such were the kind of lamentations resounding perpetually through Longbourn House.

mortification: a feeling of being very embarrassed

eg. The rapture of Lydia on this occasion, her adoration of Mrs. Forster, the delight of Mrs. Bennet, and the mortification of Kitty, are scarcely to be described.

ecstasy: a state of extreme happiness, epecially when feeling pleasure

eg. Wholly inattentive to her sister's feeling, Lydia flew about the house in restless ecstasy, calling for every one's congratulations.

repine: to feel sad or complain about something, especially a bad situation

peevish: easily annoyed

eg. Whilst the luckless Kitty continued in the parlour repining at her fate in terms as unreasonable as her accent was peevish.

detestable: used to refer to people or things that you hate very much

eg. And detestable as such a step must make her, were it known, she could not help secretly advising her father not to let her go.

squeamish: easily upset or shocked by things that you find unpleasant or that you do not approve of

eg. Such squeamish youths as cannot bear to be connected with a little absurdity are not worth a regret.

aloof: not friendly or willing to take part in things

eg. Let me see the list of the pitiful fellows who have been kept aloof by Lydia's folly.

exuberant: (especially of people and their behaviour) very energetic

eg. If you, my dear father, will not take the trouble of checking her exuberant spirits, and of teaching her that her present? pursuits are not to be the business of her life, she will soon be beyond the reach of amendment.

ward off:?to prevent or defend against.

eg. From ignorance and emptiness of her mind, she wholly unable to ward off any portion of that universal contempt which her rage for admiration will excite.

voluble: characterized by ready or rapid speech

eg. Had Lydia and her mother known the substance of her conference with her father, their indigantion would hardly found expression in their united volubility.

earthly: happening in or related to the physical world or real life

eg. In Lydia's imagination, a visit to Brighton comprised every possibility of earthly happiness.

frivolous: behaving in a silly way and not taking anything seriously

eg. She lost all concern for him in finding herself thus selected as the object of such idle and frivolous galllantry.

apprehensive: feeling worried about something that you are going to do or that is going to happen

eg. There was something in her countenance which made him listen with an apprehensive and anxious attention.

injunction: an official order given by a law court, usually to stop someone from doing something

eg. Mrs.Bennet was diffuse in her good wishes for the fecility of her daughter, and impressive in her injunctions that she would not miss the opportunity of enjoying herself as much as possible.

clamorous: making loud demands or complaints

adieu: goodbye

bid someone adieu

eg. And in the clamorous happiness Lydia herslef in bidding farewell, the more gentle adieus of her sisters were uttered without being heard.