IPA: /ˈdaʊtəbl/
KK: /ˈdaʊtəbl/
Able to be questioned or doubted; uncertain or suspicious about something.
His explanation was doubtable, leaving many people confused about the truth.
Doubtable → It is formed from "doubt" (from Old French *douter*, meaning to fear or be uncertain) and "-able" (meaning capable of or worthy of). The word "doubtable" means capable of being doubted or uncertain.
Think of the word 'doubt' which relates to uncertainty, and remember that 'doubtable' describes something that can be doubted.