incontestable
adjectiveSo firmly established that it cannot reasonably be challenged.
Beyond reasonable challenge
Closest synonyms
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8 entries matching "firm" / Letter I / Showing 1-8
Clear all filtersindecisiveness
nounA tendency to struggle with making clear or firm choices.
Tendency not to decide
Closest synonyms
infirmity
nounA weakness or lack of strength, sometimes related to age or illness.
ingrained
adjectiveSo deeply established that it is difficult to change.
insecure
adjectiveNot stable or assured, or lacking confidence about one's position.
Lacking confidence
Closest synonyms
More alternatives and senses in the full reference.
intransigent
adjectiveUnwilling to compromise or change a firmly held position.
One word family: also includes intransigence.
inveterate
adjectiveLong established and habitual, especially of a tendency or person.
irresolute
adjectiveUncertain and unable to make a firm decision.
The headwords include the original WordCraft collection and the requested October additions. Related alternatives can include words outside that collection. Open a full reference to compare the sense and usage note.