noun

a supporter of King Charles I in the English Civil War.

Royalist,king’s man

adjective

showing a lack of proper concern; offhand.

Anne was irritated by his cavalier attitude

offhand,indifferent,casual,dismissive,insouciant,uninterested,unconcerned,supercilious,patronizing,condescending,haughty,arrogant,lofty,lordly,disdainful,scornful,contemptuous,unceremonious,discourteous,uncivil,insolent,rude,glib,ungracious,perfunctory,cursory,curt,abrupt,terse,brusque,off,offish,couldn’t-care-less,take-it-or-leave-it,pococurante