watertight
wa·ter·tight
adjective
3.
without flaws or loopholes
- “an ironclad contract”
- “a watertight alibi”
- “a bulletproof argument”
Origin
From water + tight.
Phrases
- hold water
WordNet 2.1 (Princeton University). Wiktionary (CC BY-SA). CMU Pronouncing Dictionary. WordNet 2.1 Copyright Princeton University. All rights reserved. Wiktionary content is available under the Creative Commons Attribution-ShareAlike Licence.