bedrock

roche mère, substratum rocheux

Couche de roche solide située sous la terre et les pierres détachées.

En anglais simple : The solid layer of rock underneath soil and loose stones.

• The builders reached bedrock.
• We drilled through the soil into bedrock.
• Glaciers had scraped away the soil, exposing the bedrock.

Expressions courantes : solid bedrock, exposed bedrock, reach bedrock, drill into bedrock

fondement, socle

Idée, conviction ou soutien principal sur lequel repose quelque chose.

En anglais simple : The main idea, belief, or support on which something depends.

• Trust is the bedrock of our relationship.
• These values formed the bedrock of her teaching.
• Small businesses remain the bedrock of the local economy.

Comment l'utiliser : the bedrock of something (Trust is the bedrock of a good friendship.)

Synonymes : foundation, basis, cornerstone

Expressions courantes : bedrock of something, form the bedrock, bedrock principle