familiar β well-acquainted; thoroughly conversant: to be familiar with a subject.
ordinary β of no special quality or interest; commonplace; unexceptional: One novel is brilliant, the other is decidedly ordinary; an ordinary person.
bad β If you say that it is bad that something happens, you mean it is unacceptable, unfortunate, or wrong.
believable β Something that is believable makes you think that it could be true or real.
credible β Credible means able to be trusted or believed.
plausible β having an appearance of truth or reason; seemingly worthy of approval or acceptance; credible; believable: a plausible excuse; a plausible plot.
poor β having little or no money, goods, or other means of support: a poor family living on welfare.
possible β that may or can be, exist, happen, be done, be used, etc.: a disease with no possible cure.
tenable β capable of being held, maintained, or defended, as against attack or dispute: a tenable theory.