untiring
ADJECTIVE
determined, persevering
Synonyms
WEAK
constant
continued
continuing
dedicated
devoted
dogged
eager beaver
fireball
firm
go-go
grind
hyper
incessant
indefatigable
indomitable
inexhaustible
jumping
patient
perky
persistent
pertinacious
plodding
plugging
resolute
staunch
steady
strong
tenacious
tireless
unceasing
undeterred
unfailing
unfaltering
unflagging
unflinching
unremitting
unstinted
unswerving
unwavering
unwearied
Antonyms
