pertinacious
adjective
[ ˌpəːtɪˈneɪʃəs ]
• holding firmly to an opinion or a course of action.
• "he worked with a pertinacious resistance to interruptions"
Similar:
determined,
tenacious,
persistent,
persevering,
assiduous,
purposeful,
resolute,
dogged,
indefatigable,
insistent,
single-minded,
unrelenting,
relentless,
implacable,
uncompromising,
unyielding,
tireless,
unshakeable,
importunate,
stubborn,
stubborn as a mule,
mulish,
obstinate,
obdurate,
strong-willed,
headstrong,
inflexible,
unbending,
intransigent,
intractable,
pig-headed,
bull-headed,
stiff-necked,
with one's toes/feet dug in,
wilful,
refractory,
contrary,
perverse,
bloody-minded,
indurate,
Origin:
early 17th century: from Latin pertinax, pertinac- ‘holding fast’ + -ous.
