lǐ​qū​cí​qióng

to not have a leg to stand on

Senses

理屈词穷/ 理屈詞窮 lǐ​qū​cí​qióng to not have a leg to stand on

To be unable to provide a convincing argument or to fall silent after being bested in a debate; literally, one's reasoning is flawed and words have run out.

References

antonym 义正辞严/義正辭嚴 理屈词穷/理屈詞窮