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Open English Wordnet
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Adjectives
(s)
foolproof
,
unfailing
not liable to failure
“a foolproof identification system”
,
“the unfailing sign of an amateur”
,
“an unfailing test”
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(s)
unfailing
always able to supply more
“an unfailing source of good stories”
,
“a subject of unfailing interest”
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(s)
unfailing
,
unflagging
tireless
“unfailing loyalty”
,
“unfailing good spirits”
,
“unflagging courtesy”
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