untiring
adjective. determined, persevering
- 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
Roget's 21st Century Thesaurus, Third Edition Copyright © 2013 by the
Philip Lief Group.