deep + cry... focus on the CRY PART ...a girl CRYING to express her disapproval of getting married now.
I will always DECRY people who cry without fighting the situation...we should face every situation with courage...
de + 'cry'...any one will cry to show their disapproval
decry-> girls deep cry for the disapproval of marriage by loving boys
decry is crying and weeping but with a "de" which means deep disapproval