What is the opposite of well-defined?

Need antonyms for well-defined? Here's a list of opposite words from our thesaurus that you can use instead.

Contexts Opposite of expressed or defined in a comprehensible or understandable manner Opposite of easy to understand Opposite of firm, strong, or substantial Adjective ▲ Opposite of expressed or defined in a comprehensible or understandable manner ambiguous fuzzy ill-defined indefinite obscure questionable vague unclear imprecise undefined indistinct blurry blurred confusing equivocal cryptic inexplicit abstruse non-specific approximate hazy uncertain inexact unspecific woollyUK woolyUS inaccurate unreliable Adjective ▲ Opposite of easy to understand complicated convoluted unclear unintelligible abstruse advanced vague complex difficult elaborate intricate problematic puzzling sophisticated involved “It is a complicated problem that will require a bit of mulling over.” Adjective ▲ Opposite of firm, strong, or substantial fragile crumbling decaying precarious decrepit unsound weak compromised deteriorated rickety breakable delicate inadequate ruined vulnerable dilapidated frail iffy tumbledown unreliable unsteady fracturable shabby unstable worn deteriorating feeble insubstantial rundown shaky weakly destructible dodgy flimsy bedraggled derelict friable battered decayed quavering uncertain brittle creaky frangible insecure antiquated crumbly haggard shatterable wispy broken-down easily broken easily destroyed falling apart in disrepair in ruins run down run-down weather-beaten worn out worn-out falling to pieces worse for wear in a state of disrepair on its last legs “From years of decay, the columns holding the structure together appear to be fragile.” Find more words! 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Sentences with the word well-defined Words that rhyme with well-defined Use our Antonym Finder Nearby Words wellderly well-deserved well-designed well developed well-developed well-directed well defined well defended well-covered well coordinated well cooked well-constructed