Английский словарь американских идиом - play on

or play upon {v.} 1. To cause an effect on; influence. * /A heavy diet of television drama played on his feelings./ 2. To work upon for a planned effect; excite to a desired action by cunning plans; manage. * /The makeup salesman played on the woman's wish to look beautiful./ * /In some places, leaders play upon people's superstitious fears./ * /He played on the man's ambition and love of honor./