stubborn

SMART Vocabulary: related words and phrases

Continuous & permanent
abidingly
ad infinitum
around-the-clock
be
ceaseless
immanence
immanent
immanently
imperishable
imperishably
on the spinidiom
on the trotidiom
perennial
permanence
permanency
unrelentingly
unrelieved
unrelievedly
unremitting
unremittingly

abiding | American Dictionary

abiding
adjective
us/əˈbɑɪd·ɪŋ/
lasting for a long time:
Muir had an abiding interest in dogs.