IPA: /ˈdjuːpəbl/
KK: /ˈduːpəbl/
Able to be tricked or deceived easily.
He is so trusting that he is often dupable by scams.
Dupable → It is formed from "dupe" (from French *duper*, meaning to deceive) and the suffix "-able" (meaning capable of). The word "dupable" means capable of being deceived.
Think of the word 'dupe' which means to deceive, and remember that 'dupable' refers to someone who is capable of being deceived.