to start something from the very beginning
commencer quelque chose depuis le tout début (commencer quelque chose depuis le tout debut)
"They built the company from scratch with no outside funding."
"Ils ont construit l'entreprise depuis zéro sans financement extérieur." (Ils ont construit l'entreprise depuis zéro sans financement extérieur.)
a general practical principle based on experience
very rarely
information spread by people talking to each other
to be under a lot of pressure or stress
to face a temporary problem or setback
being very careful not to upset someone