IPA: /ɪnˌfælɪˈbɪlɪti/
KK: /ɪnˌfælɪˈbɪlɪti/
The quality of never making a mistake or being wrong.
Many people believe in the infallibility of their leaders, but everyone can make mistakes.
Infallibility → It is formed from "in-" (meaning not) and "fallere" (meaning to deceive or to fall) combined with the suffix "-ity" (meaning the state or quality of). The word refers to the state of being incapable of making mistakes or being deceived.
Think of 'not' ('in-') being able to 'fall' or make mistakes ('fallere') — that's why infallibility means the quality of being incapable of error.