茕茕孑立 standing alone, in isolation. qiong2 qiong2 jie2 li4

茕bright fire on top as a phonetic element simplified to grass ; a fast flying bird under a roof is the idea.

孑 eggs or larvae

https://hanziyuan.net/#%E5%8D%82

沆瀣一起 

acting in collusion

 hang xie yi qi

沆 ferry boat. River on the left, strong soldier on the right.

 瀣 mist. water on the left, scapula on top left hand on top right, split wings below, these are all basically importune signs, bones, broken wings, by water. Broken wings as "not" + water = mist is not (exactly) water. 韰 means a type of scallion (meat on top, leeks on the bottom). Note however that onions are prohibited to Buddhist vegetarians, again: importune.

https://hanziyuan.net/#%E7%80%A3

沆瀣 what kind of importune ferry passes through the mist with a strong warrior? Death, Charon.

一起 lit. as one rising up; i.e. together.

A ferry passes through mists as one rises up together; in other words

沆瀣一起　＝　acting together in collusion. hang4 xie4 yi1 qi3