firmly

adverb

firm·​ly

: in a firm manner : steadfastly, resolutely, soundly, solidly, strongly

firmly entrenched in the mountainous parts along the northern border

—Collier's Year Book

a group of staid brownstone and brick dwellings stands firmly against time

—American Guide Series: New York City

Word History

Etymology

Middle English fermely, firmely, from ferm, ferme firm + -ly

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