infallible

adjectiveformal/ĩfɐˈlivɛɫ/medium

in·fa·lí·vel

Definition

Incapable of making mistakes or being wrong; absolutely reliable.

His memory for names was infallible.

No strategy in war is truly infallible.

syn

ant

Common collocations

infallible methodinfallible logicinfallible instinct

Do latim 'infallibilis'.