The con artist came up with a plausible excuse to explain his absence.

plausible 是由词根 plaus（拉丁语，意为"鼓掌、赞同"）加上形容词后缀 -ible（表示"能够...的"）组成。字面意思是"能够获得赞同的"，引申为"看似合理的、可信的"。