airtight
air‧tight /ˈeətaɪt $ ˈer-/
adjective
1. not allowing air to get in or out:
airtight containers
2. planned or done so carefully that there is no chance of any problems or mistakes
SYN watertight:
an airtight alibi
air‧tight /ˈeətaɪt $ ˈer-/
adjective1. not allowing air to get in or out:
2. planned or done so carefully that there is no chance of any problems or mistakes
SYN watertight: