ㄌㄧˇㄑㄩˊㄑㄩㄥˊlǐqū‑cíqióng

理屈词穷
  1. 自覺)​理虧無話可說 自覺理屈詞窮只得道歉和解」、事實面前對方理屈詞窮放棄不合要求」。

faulty argument and poor rhetoric (idiom)​; unable to put forward any convincing arguments, without a leg to stand on