Believable (adjective)

1. Able to be believed; credible.
2. Seeming to be true or real.

Origin:

From the word "believe".

Examples:

1. He gave a believable excuse for being late.
2. The story was not believable.
3. The witness's testimony was believable.
4. The explanation was hardly believable.
5. The actor's performance was so believable that it was hard to tell if it was acting or reality.