ballast

lest

Matériau lourd placé dans un bateau ou un ballon pour le stabiliser ou régler son équilibre.

En anglais simple : Heavy material put in a ship or balloon to keep it steady or control its balance.

• The ship carries ballast for balance.
• They added sand as ballast to steady the boat.
• The balloon rose after the pilot released some ballast.

Synonymes : stabilizing weight

Expressions courantes : water ballast, carry ballast, release ballast

ballast

Pierres grossières placées sous les voies ferrées ou les routes, ou utilisées dans le béton.

En anglais simple : Rough stones laid under railway tracks or roads, or used in concrete.

• Workers spread ballast under the tracks.
• The ballast helps rainwater drain away.
• Fresh ballast was laid along the repaired railway line.

Synonymes : track gravel

Expressions courantes : railway ballast, track ballast, lay ballast

lester

Mettre du matériau lourd dans un bateau ou un autre objet pour le stabiliser.

En anglais simple : To put heavy material in a ship or other object to make it steady.

• They ballast the boat with sand.
• The crew ballasted the ship before departure.
• We need to ballast the vessel evenly.

Comment l'utiliser : ballast something with something (They ballasted the boat with bags of sand.)

Synonymes : weight, stabilize

Expressions courantes : ballast a ship, ballast with something, ballast a boat