biggestinfluence

noun
UK /ˈbɪɡɪst ˈɪnfluəns/
US /ˈbɪɡɪst ˈɪnfluəns/

The person or thing that changes what you do or think the most.

My grandmother was the biggest influence on how I learned to cook.


OTHER MEANINGS

2. The most powerful force shaping a group or event.

The biggest influence on the team's success was their coach.

3. The strongest factor in a decision or choice.

Price was the biggest influence when we picked our new car.

4. The most important source of ideas for an artist or writer.

Nature was the biggest influence on her paintings.