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firm up

VERB
stabilize
Synonyms
STRONGEST
balance fix maintain preserve secure steady sustain
STRONG
ballast bolt brace buttress counterbalance counterpoise equalize fasten firm freeze ossify poise prop set settle stiffen support uphold
WEAK
stabilitate
Antonyms
STRONGEST
destroy forget hurt ignore neglect
STRONG
drop fall let down let go liquefy loosen melt open release soften unfasten unlock weaken
WEAK
change shake vary wobble

Example Sentences

Examples are provided to illustrate real-world usage of words in context. Any opinions expressed do not reflect the views of Dictionary.com.

They are planning to firm up a framework for the summit between Trump and Chinese leader Xi Jinping, currently slated for the beginning of April.

From The Wall Street Journal • Mar. 5, 2026

Bolton and his brother have been propping the firm up with their own money, but he said they "just can't do it anymore".

From BBC • Jan. 30, 2026

You’d want to call a lawyer right away and firm up a plan for what she wants or to make you her agent for decision-making.

From MarketWatch • Jan. 26, 2026

The report showed US companies shed 32,000 jobs in November, payroll firm ADP said, in a surprise drop set to firm up expectations of a Federal Reserve interest rate cut next week.

From Barron's • Dec. 3, 2025

He wanted to firm up the details of his plan to go down the well-traveled Paraguay River and the Tapajós River all the way to where it met the Amazon River.

From "Death on the River of Doubt" by Samantha Seiple