flint

• Roca sedimentaria dura compuesta de cuarzo, utilizada históricamente para fabricar herramientas y para producir chispas al golpearla contra el acero.

A hard, opaque form of silica, a type of stone that can be used to produce sparks when struck against steel.

1. Hard stoneB2formal

   A hard, grey stone that produces sparks when struck against steel, historically used for starting fires.

   Pedernal

   • He used a piece of flint to light the campfire.
   • Archaeologists found flint tools from the Stone Age.
   • The flint struck the steel and created a spark.

   Sinónimoschertfirestoneflintstonesilex

2. Something hard or unyieldingC1informal

   Used metaphorically to describe a person's character as hard, unyielding, or lacking emotion.

   Dureza de carácter

   • Her heart was like flint after the betrayal.
   • He has a flint-like determination to succeed.
   • The negotiator's expression was as hard as flint.

   Sinónimosadamantgraniterocksteelstone