Implausible (adjective)

1. Not having an appearance of truth or credibility.
2. Inconsistent with what is reasonable or possible.
3. Unbelievable or unlikely.

Origin:

The word 'implausible' is derived from the latin word 'implausibilis' meaning 'not worthy of applause' or 'not credible'. the word was first used in english in the mid-17th century.

Examples:

1. The implausible story about the alien invasion was met with skepticism from the audience.
2. The police found the suspect's alibi to be implausible and continued to investigate the case.
3. The theory about time travel was implausible and was dismissed by the scientific community.
4. The movie's plot was filled with implausible twists and turns, leaving the audience feeling unsatisfied.
5. The defense lawyer's argument was implausible and the jury did not believe his client was innocent.