"fraught with uncertainty or doubt; \"they were doubtful that the cord would hold\"; \"it was doubtful whether she would be admitted\"; \"dubious about agreeing to go\""@en-us . "modal"^^ . "0.125"^^ . "00338013-a"^^ . "300329386"@en-us . . . "modal"^^ . "dubious"@en-us . . "300333484"@en-us . . "doubtful"^^ . "0"^^ . . "300338013"@en-us . "300338013"^^ . . . . "doubtful"@en-us .