airtight

• Se dit de quelque chose de scellé de manière à ce que l'air ne puisse ni entrer ni sortir ; s'emploie aussi au sens figuré pour qualifier ce qui est impossible à contester ou à remettre en question.

Describes something that is sealed so that no air can enter or escape; also used figuratively to mean impossible to dispute or question.

1. Sealed against airB1formal

   Not allowing air or gas to pass in or out.

   hermétique

   • The container is airtight to keep the food fresh.
   • Airtight seals are essential for vacuum packaging.
   • The laboratory uses airtight chambers for experiments.

   Synonymesgas-tighthermeticimpermeableleakproofsealed

   Antonymesleakypermeableporousventilated

2. Flawless or unassailableB2informal

   Having no weak points; impossible to disprove or argue against.

   sans faille

   • The lawyer presented an airtight case to the jury.
   • Her argument was so airtight that no one could challenge it.
   • He has an airtight alibi for the night of the crime.

   Synonymesimpregnableincontrovertibleindisputableinvulnerableirrefutablesoundunassailablewatertight

   Antonymesassailableflawedpenetrablequestionablerefutablevulnerable