firm
US /fɝːm/
UK /fɝːm/

1.
having a solid, almost unyielding surface or structure
:
•
The ground was firm after the rain.
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She prefers a firm mattress.
2.
strongly felt or decided; not wavering
:
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He took a firm stand on the issue.
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She has a firm belief in justice.
1.
a business concern, especially one offering professional services
:
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He works for a law firm.
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The accounting firm handles many large clients.
1.
to make something firm or firmer
:
•
The concrete needs time to firm up.
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The company decided to firm up its policies.