airtight

Adjective
  1. Having no weak points (synset 302535756)
    "an airtight defense"; "an airtight argument"
    similar to: invulnerable - immune to attack; impregnable
    same as: air-tight
  2. Not allowing air or gas to pass in or out (synset 301401532)
    similar to: tight - of such close construction as to be impermeable
    same as: air-tight, gas-tight

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