Answer: airtight

AnswerCrossword Clue
AIRTIGHTSolid, alibiwise
AIRTIGHTSealed completely, perhaps
AIRTIGHTLike some alibis
AIRTIGHTWithout leaks.
AIRTIGHTImpenetrable.
AIRTIGHTHermetically sealed
AIRTIGHTUnassailable, as an alibi
AIRTIGHTPerfect, as an alibi
AIRTIGHTLike some alibis?
AIRTIGHTLike good alibis
AIRTIGHTLike perfect alibis
airtightimpermeable to air
airtighthaving no weak points
airtightimpermeable to air