参与

participate in; participate; join; join in; take part; take part in; play a part in; engage in; get involved; have a hand in; pitch in; participation; involvement; participatory; involved; in

欺诈

cheat; fraud; defraud; swindle; deceive; trick; dupe; fleece; deceit; deception; scam; trickery

勾当

activity; affair; scheme; plot; shady business; dirty work