nouveau riche
Pronunciation: "nü-"vO-'rEsh
Function: noun
Inflected Form(s): plural nou·veaux riches /same/Etymology: French, literally, new rich
: a person newly rich : PARVENU

alacrity
Pronunciation: &-'la-kr&-tE
Function: noun
Etymology: Latin alacritas, from alacr-, alacer lively, eager
: promptness in response : cheerful readiness - alacritous /-kr&-t&s/ adjective

petulant
Pronunciation: -l&ntFunction: adjectiveEtymology: L or Middle French; Middle French, from Latin petulant-, petulans; akin to Latin petere to go to, attack, seek -- more at FEATHER
1 : insolent or rude in speech or behavior
2 : characterized by temporary or capricious ill humor : PEEVISH
- petulantly adverb