Synonyms of unfailing

Adjective

1. foolproof, unfailing, infallible (vs. fallible)

usage: not liable to failure; "a foolproof identification system"; "the unfailing sign of an amateur"; "an unfailing test"

2. unfailing, inexhaustible (vs. exhaustible)

usage: always able to supply more; "an unfailing source of good stories"; "a subject of unfailing interest"

3. unfailing, unflagging, constant (vs. inconstant)

usage: unceasing; "unfailing loyalty"; "unfailing good spirits"; "unflagging courtesy"

Definition and meaning of unfailing (Dictionary)