adjective/du.tø/
doubtful, uncertain, questionable (issue, outcome, date etc.); dubious, questionable (morals, qualities etc.); rather unclean (piece of clothing)
“Son complet sombre était élimé, sa chemise douteuse, la cravate mal nouée.” — His dark suit was threadbare, his shirt rather unclean, his tie poorly tied.
From doute + -eux.