深蓝似水却看不透
[shēn lán sì shuĭ què kàn bù tòu]
'深蓝似水却看不透' could be poetically translated to 'As profound as the blue water, but impossible to fathom', indicating something deep, complex, and elusive just like deep blue water that hides its depths beneath the surface. The depth and mystery here suggest inner emotions that are rich and hard to penetrate fully.