How do you spell Plausible

Available Definitions:
1)  a. - Worthy of being applauded; praiseworthy; commendable; ready.
2)  a. - Obtaining approbation; specifically pleasing; apparently right; specious; as, a plausible pretext; plausible manners; a plausible delusion.
3)  a. - Using specious arguments or discourse; as, a plausible speaker.