facetious

/fəˈsiːʃəs/📚 30074GREsat
not serious or sincere, often in an attempt to be humorous or amusing "He made a facetious comment about the situation."

adjective [原级]诙谐的;爱开玩笑的;滑稽的;(尤指在不合适的时候)开玩笑的

Stop being facetious; this is serious.
别乱开玩笑,这是个严肃的事。

-fac- fac,fic=face 表示“脸,面”,fac,fact,fect,fic,fig=make,do,表示“做,制作”facetious adj. 轻浮的,开不正经玩笑的( facet 表面+ious →做表面化→轻浮的)
face (脸) + tious → 做鬼脸 → 滑稽的
单词造句:
网友用“Facetious”造句精选
Yet there is also an art history of rubbish (and don't forget, facetious remarks are welcome on this blog). 不过废品艺术却早有一段历史(别忘了,在此博客上欢迎戏谑的评论)。