preposterous
adjective formal uk/prɪˈpɒs.tər.əs/ us/prɪˈpɑː.stɚ.əs/
荒谬的，愚蠢的
very silly or stupid
The very idea is preposterous! 这个想法很荒谬！
a preposterous suggestion 愚蠢的建议
Synonyms: absurdcockeyedidioticlaughableludicrousnonsensicalridiculous