obdurate
stubborn
adamant
unyielding; firm in opinion
Loyalist
American colonists who remained loyal to Britain and opposed the war for independence
staunch
Firm and steadfast
true-blue
loyal, faithful
impenitence
insolence; rudeness
be adamant
refusing to be persuaded or to change one's mind
succinct
brief, concise
laconic
using few words
terse
brief and to the point
insufficient
not enough
aver
affirm or declare
hold fast to
remain tightly secured
adhere to
to stick to
compliant
yielding; submissive
complacent
self-satisfied
tractable
easily managed or controlled
docile
easy to teach or manage
amenable
agreeable