infallible C2 Topic:Cause, Change & Process US /ɪnˈfæl.ɪ.bl̩/ See IPA manual Freq #23662 Meanings 1 adj Never wrong; incapable of making a mistake. Even the most experienced doctors are not infallible. 2 adj Certain to work or produce the intended result. She swears by her grandmother's infallible cure for hiccups. Thesaurus Synonyms 2 adj · certain to work or produce... sure More faultlessindefectiveinerrantperfect ↔ Opposites defectiveerror-pronefalliblefaultfulfaultyimperfect Word family Derived forms infalliblenessnoninfallible Related forms infallibilityinfallibly Common collocations infallible memory Adjective + noun Etymology AI details From Medieval Latin infallibilis, from Latin in- + fallibilis. Compare French infaillible. By surface analysis, in- + fallible. infallibilis la-med in- Latin View etymology graph -> Topics Cause, Change & Process Word Formation & Derivatives External links Cambridge Dictionary Wiktionary Google Images # infallible **Type:** Word **Level:** C2 **Part of speech:** adj **IPA (US):** /ɪnˈfæl.ɪ.bl̩/ **Frequency rank:** 23662 ## Meanings 1. Never wrong; incapable of making a mistake. 2. Certain to work or produce the intended result. ## Examples - Even the most experienced doctors are not infallible. - She swears by her grandmother's infallible cure for hiccups. ## Synonyms - faultless - indefective - inerrant - perfect ## Antonyms - defective - error-prone - fallible - faultful - faulty - imperfect ## Derived Forms - infallibleness - noninfallible ## Related Forms - infallibility - infallibly ## Roots and Affixes - Root: infallibilis - Root: in- ## Etymology From Medieval Latin infallibilis, from Latin in- + fallibilis. Compare French infaillible. By surface analysis, in- + fallible. ## AI Etymology Infallible is from Medieval Latin infallibilis, from Latin in- + fallibilis. Compare French infaillible. By surface analysis, in- + fallible. The analysis is mainly morphological: the modern form is built from the named base and affix. Important recorded forms include infallibilis (la-med) and in- (Latin). Current senses include never wrong; incapable of making a mistake and certain to work or produce the intended result. The wider family includes derived forms such as infallibleness and noninfallible; related words such as infallibility and infallibly. ## Topics - Cause, Change & Process - Word Formation & Derivatives markdown