from scratch
US /frəm skræʧ/
UK /frəm skræʧ/

1.
do zero, desde o início
from the very beginning, without any prior preparation or advantage
:
•
We had to build the entire system from scratch.
Tivemos que construir todo o sistema do zero.
•
She learned to cook from scratch, without using any pre-made ingredients.
Ela aprendeu a cozinhar do zero, sem usar ingredientes pré-fabricados.