This is the 9457th most frequent French word.
douteuses
"Douteuses" means "doubtful" or "questionable" in English.
In this sentence, 'douteuses' is used as an adjective to describe 'intentions', indicating that her motives seemed questionable or uncertain.
Ses intentions étaient douteuses.
Her intentions were dubious.
Here, 'douteuses' is used to describe 'marchandises', meaning that the goods may have an uncertain or suspicious quality or origin.
Elle a acheté des marchandises douteuses au marché.
She bought questionable goods at the market.
In this example, 'douteuses' characterizes 'théories' as potentially unreliable or not credible.