Noah Webster
Implausible
IMPLAUS'IBLE, adjective s as z. [in and plausible.]
Not specious; not wearing the appearance of truth or credibility, and not likely to be believed; as an implausible harangue.
IMPLAUS'IBLE, adjective s as z. [in and plausible.]
Not specious; not wearing the appearance of truth or credibility, and not likely to be believed; as an implausible harangue.