What are the opposite words for un-failing?

Un-failing is a word that conveys a sense of consistency, reliability, and dependability. However, its antonyms are words that denote the lack of these qualities. Some antonyms for un-failing include erratic, unpredictable, inconsistent, unreliable, and sporadic. Erratic suggests a lack of consistency or predictability in behavior or performance. Unpredictable means that something cannot be depended on or anticipated. Inconsistent means something that lacks stability, regularity or uniformity. Unreliable refers to something that cannot be trusted or depended on. And sporadic suggests something that occurs irregularly or infrequently, making it unpredictable and unreliable.

Antonym of the day

doth to a turn
abstain, avoid, bear.