unremitting
UK: ˌʌnrɪˈmɪtɪŋ | US: ˌʌnrɪˈmɪtɪŋ
adj. continuing without interruption or weakening; persistent
The word "unremitting" combines the prefix "un-" (meaning "not") with the root "remit" (from Latin "remittere," meaning "to send back" or "to slacken"), and the suffix "-ing" (forming an adjective). Originally, "remit" implied relaxing or lessening effort, so "unremitting" literally means "not slackening" or "not easing up." Over time, it evolved to describe relentless persistence or uninterrupted continuity.
She showed unremitting dedication to her research.
The team's unremitting efforts led to a breakthrough.
His unremitting optimism inspired everyone around him.
The storm brought unremitting rain for three days.
Despite setbacks, their unremitting focus ensured success.