不可思议 | bù kě sī yì | inconceivable (idiom) / unimaginable / unfathomable | |
莫测高深 | mò cè gāo shēn | enigmatic / beyond one's depth / unfathomable | |
玄虚 | xuán xū | deceitful trick / mystery / unfathomable | |
叵测 | pǒ cè | unfathomable / unpredictable / treacherous | |
不可端倪 | bù kě duān ní | impossible to get even an outline (idiom) / unfathomable / not a clue | |
神秘莫测 | shén mì mò cè | mystery / unfathomable / enigmatic | |
深不可测 | shēn bù kě cè | deep and unmeasurable (idiom) / unfathomable depths / incomprehensible / enigmatic and impossible to predict | |
幽邃 | yōu suì | profound and unfathomable | |
居心叵测 | jū xīn pǒ cè | harboring unfathomable motives (idiom) | |
艰深晦涩 | jiān shēn huì sè | abstruse and unfathomable (idiom) |