Key: "S:" = Show Synset (semantic) relations, "W:" = Show Word (lexical) relations
Display options for sense: (gloss) "an example sentence"
Display options for word: word (sense key)
Adjective
S: (adj) foolproof (foolproof%3:00:00:infallible:00), unfailing (unfailing%3:00:00:infallible:00) (not liable to failure) "a foolproof identification system"; "the unfailing sign of an amateur"; "an unfailing test"
S: (adj) unfailing (unfailing%3:00:00:inexhaustible:00) (always able to supply more) "an unfailing source of good stories"; "a subject of unfailing interest"