瀣 瀣 xie4
mist; vapor

strokes 19
radical
水
水
strokes after radical 16
沆瀣 沆瀣 hang4 xie4
(literary) evening mist

沆瀣一气 沆瀣一氣 hang4 xie4 yi1 qi4
to act in collusion (idiom); in cahoots with; villains will look after one another