Not stopping; continuous.
That cannot be resisted; irresistible
Made to withstand repeated use over a relatively long period, usually several years or more:
Stubbornly persevering; tenacious:
That cannot be tired out; tireless
Never slackening; persistent.
Not easily captured or defeated:
Continually occurring; persistent:
Never wearying; tireless; indefatigable
The definition of sedulous is someone who is diligent, hard working and persistent.
Habitual or regular; by habit
The definition of resolute is being firm and unwavering in your convictions.
Refusing to relent; continuing, esp. in the face of opposition, interference, etc.; stubborn; persevering
Progressing slowly and laboriously.
Holding tenaciously or stubbornly to a purpose, opinion, or course of action:
Showing neither fear nor indecision; resolute.
Not veering or turning aside:
Not easily discouraged, defeated, or subdued; unyielding; unconquerable
Firm; steadfast; loyal
Always reliable; certain
Lacking in strength of body or muscle; not physically strong
The definition of spasmodic is something relating to a spasm or a sudden movement.
The definition of endless is continuing forever, or lasting for a very long time.
Characteristic of a tireless person; continuing, persistent, etc.
Unsure of how to act or proceed; undecided.
Having or showing a capacity for protracted effort, regardless of difficulty or frustration
The definition of tired is being bored with something, or something that has become stale or being fatigued and in need of rest.
The definition of hardworking is a term used to describe a person or thing that is diligent or zealous at completing a task.
(Obsolete) Skillful; clever.
Find another word for untiring. In this page you can discover 55 synonyms, antonyms, idiomatic expressions, and related words for untiring, like: unceasing, unflagging, resistless, durable, determined, dogged, unwavering, intermittent, inexhaustible, indefatigable and powerful.