Part of speech:
The definition of iron is something that is strong and enduring.
Unpleasantly coarse and rough to the touch:
Remaining steady in affections or loyalties; faithful
Beyond what is proper or usual; excessive
The definition of determined is someone with their mind made up about something.
The definition of unremitting is persistent or not letting up.
Disposed to inflict pain or suffering:
Not willing to change one's opinion, purpose, or principles; unyielding.
Attached together in repeated units:
Fierce; savage; violently cruel
Using or based on data that are readily quantified or verified:
The definition of implacable is someone or something who cannot be calmed or made less angry.
That cannot be changed; fixed; unalterable
The definition of rigorous is something that is painfully exact or precise.
Causing great discomfort, damage, or distress:
Firm in standing or position; not tottering or shaking; fixed; firm.
The definition of stern is someone who is very serious or strict.
Governed or governing by exact rules; observing exact rules; severe; rigorous.
Holding together firmly; cohesive:
Not relaxing or slackening, as in effort, speed, etc.
Not willing to change or be persuaded; resolute:
Having or tending to have a short life span or existence
Not harsh or severe in disciplining, punishing, judging, etc.; mild; merciful; clement
Full of mercy; compassionate:
Relating to or being vibrations, especially musical tones, produced in one body by energy from a nearby vibrating body and having the same frequency as the vibration of the nearby body.
Stubbornly resistant to change or unwaveringly loyal even in spite of inevitable defeat, failure, etc.
Grim is defined as stern or unmoving.
Not compliant; not yielding; not pliant
Not easily moved to pity or sympathy; hardhearted
Having no pity or compassion; merciless.
Stubborn is defined as being unwilling to change your opinion or stance, in spite of good reasons to.
Unwilling to grant concessions or negotiate; inflexible:
Without an end.
The definition of endless is continuing forever, or lasting for a very long time.
Continuing indefinitely, or during a long period; perpetual; sometimes used, colloquially, as a strong intensive.
Without, or apparently without, end; lasting, or seeming to last, forever; endless
Made or done without stops:
Continuing indefinitely without interruption; unceasing; constant
Always reliable; certain
Firmly, often unreasonably immovable in purpose or will
Existing or occurring without interruption or end
Reluctant or refusing to forgive:
Being without beginning or end:
Find another word for relentless. In this page you can discover 72 synonyms, antonyms, idiomatic expressions, and related words for relentless, like: iron, harsh, constant, unappeasable, unmerciful, determined, unremitting, cruel, ruthless, adamant and continuous.