superfirm

adjective

su·​per·​firm ˌsü-pər-ˈfərm How to pronounce superfirm (audio)
: extremely firm
superfirm mattresses

Word History

First Known Use

1928, in the meaning defined above

Time Traveler
The first known use of superfirm was in 1928

Rhymes for superfirm

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Browse Nearby Words

superfinish
superfirm
superfix
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Cite this Entry

“Superfirm.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/superfirm. Accessed 12 Jul. 2025.

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