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Adjective: airtight  'ehr`tIt
  1. Having no weak points
    "an airtight defence"; "an airtight argument"
    - air-tight
     
  2. Not allowing air or gas to pass in or out
    - air-tight, gas-tight

See also: invulnerable, tight

Encyclopedia: Airtight

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airsickness
airside
air-slake
air-sleeve
airspace
airspeed
airstream
airstrip
airt
airtight
airtime
air-to-air
air-to-air missile
air-to-ground
air-to-ground missile
air-to-surface
air-to-surface missile
airwave
airway