Disjointed : lacking a coherent sequence or connection
Connected : associated or linked or related
Useful : able to be used for a practical purpose or in several ways
Responsible : having an obligation to do something or having control over or care for someone as part of one's job or role
Imprecise : lacking exactness and accuracy of expression or detail
Implied : hinted at or suggested, not directly expressed
Hence, antonym of Disjointed is Connected.