Grammar fix

firm decision

clear final choice

A firm decision is a choice that someone has made with confidence and is not likely to change.

collocationB1occasional

Hear it in context

Notice where the phrase sounds natural.

After thinking it over for days, she finally made a firm decision to move abroad.daily life
In my opinion, making a firm decision is important when choosing a university, because it helps you stay focused and avoid second-guessing yourself.IELTS speaking

Pattern: make/take/reach a firm decision (about/on something)

WrongI made a firm decision of leaving.

RightI made a firm decision to leave.

'Decision TO + verb'.

Patternmake/take/reach a firm decision (about/on something)

Choose the version that sounds natural in speech.

Stiff I have arrived at an unwavering resolution.

Natural I've made a firm decision.

'Unwavering resolution' is formal; 'firm decision' is the natural phrase.

Words that usually travel with it.

Unlike a 'temporary decision' or a 'tentative decision', a 'firm decision' means you are sure and will not change your mind.