airtight

No leaks possible

Airtight describes something sealed so completely that air cannot pass through: an airtight container.

The figurative sense dominates: an airtight argument or alibi has no gaps or weaknesses that opponents could exploit.

The prosecution's case was airtight.

The word implies invulnerability to challenge or escape.

argument

irrefutable

Impossible to disprove

foolproof · unimpeachable · incontrovertible · ironclad · flawless · impeccable · conclusive · solid · rigorous · logical

alibi

unbreakable

Impossible to damage

verifiable · corroborated · unshakeable · bulletproof · unassailable · witness · testimony · evidence · confirmed · proven

impermeable

waterproof

Impervious to moisture

barrier · membrane · coating · resistant · oilproof · gasproof · insulated · shielding · lining · encapsulation

sealed

leakproof

Impervious to seepage

caulked · lidded · corked · weatherproof · bonded · welded · soldered · shrink-wrapped · tamper-proof · clamshell

security

vault

Secure storage chamber

fortified · encrypted · impenetrable · tamper-proof · safeguard · firewall · protected · surveillance · biometric · compartmentalized

vacuum

suction

Pulling via pressure difference

pump · vacuum-sealed · depressurized · space · void · airless · oxygen-free · desiccated

Categories
Opposites
logical soundness

airtightflawed

Having faults or imperfections

weak · questionable · shaky · vulnerable · dubious

physical sealing/permeability

airtightleaky

Allowing unwanted seepage

permeable · porous · unsealed · open · breathable

Phrases
Family

airtightness

Familiarity
Top 20,000
Profile
Known to kids · Used worldwide · Timeless · Concrete · Everyday, not technical · Rated G