The phrase "a sinful act" is correct and usable in written English.
It can be used in contexts discussing morality, ethics, or religious beliefs regarding actions considered wrong or immoral.
Example: "Many cultures have their own definitions of what constitutes a sinful act, often influenced by religious teachings."
Alternatives: "an immoral action" or "a wrongful deed".
"Condoms have this connotation that you are going to do a sinful act," he said.
The Israeli prime minister, Ariel Sharon, denounced the shooting as a "sinful act by a bloodthirsty terrorist" aimed at dividing the country.
In this case, police granted De Santos an exit visa because they said her attacker had committed "haram", a sinful act.
Generally, the cause has been found in the supposition of some primordial ignorance or error rather than in a sinful act of disobedience or revolt i.e., in an intellectual rather than a moral defect.
Narges Hosseini, who was arrested on January 29th, after a similar protest on Enghelab Street, now faces charges of "committing a sinful act" and "violating public prudency," and also of "encouraging immorality or prostitution".
The women were charged with "a sinful act" and "violating public prudency" as well as "encouraging immorality or prostitution". The charges carried sentences of up to a decade in prison.
According to Elder Allan Russell of the Emmanuel Apostolic Church, Lee's film is an attempt to "indoctrinate the world to a most sinful act".
It was, objectively speaking, a gravely sinful act.
But some conservative leaders argue that these so called "Huckabee babies" should be brought to term and raised to be an army of professional scolds, forever reminding the nation's heathen that sex is an unnatural, sinful act, invented by Hollywood liberals.
It's likely that the majority of those reminders will come from someone like my cousin Abdul, who regularly takes it upon himself to remind me – via WhatsApp, Facebook and Twitter – that it is indeed Ramadan and that I should avoid all sinful acts, like talking to women or going to the pub.
Such action was denounced by Hizbollah Students, a group of university pupils with links to Iran's Revolutionary Guard, who called for her prosecution for the "sinful act of kissing a strange man in public".
