full-proof
Cannot possibly fail
Full-proof is a common misspelling of foolproof, meaning designed to be impossible to misuse or fail.
The error likely comes from interpreting the word as "fully protected" rather than its actual meaning: so simple that even a fool couldn't get it wrong.
Is this plan full-proof? should be Is this plan foolproof?
Promised with certainty
- certainFree from doubt
- fail-safeAutomatic harm prevention mechanism
- infallibleIncapable of being wrong
- dependableWorthy of trust
surefire · watertight · airtight · bulletproof · ironclad · secure · reliable · tested
Following ordered procedures
- rigorousExtremely thorough and careful
- thoroughComplete in every detail
- comprehensiveIncluding all elements
- meticulousShowing extreme attention to detail
exhaustive · complete · detailed · step-by-step · methodical · careful · precise · exacting
guaranteed
Promised with certainty
- certainFree from doubt
- fail-safeAutomatic harm prevention mechanism
- infallibleIncapable of being wrong
dependable · surefire · watertight · airtight · bulletproof · ironclad · secure · reliable · tested · verified
systematic
Following ordered procedures
- rigorousExtremely thorough and careful
- thoroughComplete in every detail
- comprehensiveIncluding all elements
meticulous · exhaustive · complete · detailed · step-by-step · methodical · careful · precise · exacting · painstaking
undiluted
Not mixed with anything
concentrated · potent · strong · spirits · whiskey · rum · ABV · straight · unadulterated · pure
full-prooffallible
Capable of error
unreliable · flawed · error-prone · vulnerable · risky
full-proofrisky
Involving possible harm
dangerous · hazardous · precarious · perilous · dicey
full-proofconfusing
Causing mental uncertainty
tricky · finicky · fiddly · counterintuitive · user-unfriendly
full, fully, fullness, fuller, fullest, proof, proofs, proofed, proofing