questionable
adjective/ˈkwɛstʃənəbəl/
Frequency rank: #5,506 of 20,003 in the WORDED list (wordfreq data)
Meaning
doubtful or uncertain in quality, honesty, or appropriateness.

Example sentence
The scientist's methods were considered questionable by many of her colleagues.
Synonyms & related words
More words in ranks 5,501–5,600
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