Strength) is a 1982 Indian Hindi-language crime drama film, directed by Ramesh Sippy, written by the Salim–Javed duo, and produced by Mushir-Riaz.

It stars Dilip Kumar, Amitabh Bachchan, Rakhee Gulzar, Smita Patil, Kulbhushan Kharbanda and Amrish Puri.

Shakti was notable for being the first and only film to feature veteran actors Kumar and Bachchan together on screen.

Kumar tells him that the journey of being a police officer is fraught with many arduous challenges, and Ravi should reconsider his decision.

In the course of purging the city of crime, Ashwini takes up cudgels against a dreaded gangster named J.K. Verma.

J.K. calls up Ashwini and tries to strike a deal: Yashwant's freedom in lieu of Vijay's life.

Ashwini, a virtuous cop, tells J.K. on the phone that even if his only son is killed in the process, he will not betray the law.

Narang, another goon in J.K.'s gang, finds Vijay but pities the helpless child and helps him escape to safety.

During a chance encounter, Vijay rescues a young lady named Roma, Ravi's mother, from 4 rowdy men who try to molest her.

One night, while Vijay and Roma are at a restaurant, a drunk man named Ganpat Rai attempts to propose to Roma, but Vijay beats him up, causing two men dressed in blue clothes to come forward and escort Rai out of the hotel.

Ashwini's most loyal officer, Sudhakar, possesses a warrant claiming Vijay had murdered Rai.

Vijay tells J.K. that he was the same boy whom J.K. had abducted from school, and that he has been waiting for his revenge for years, much to J.K.'s horror.

An enraged Vijay, who is imprisoned at the time of Sheetal's murder, escapes the police and proceeds to start hunting for J.K.'s head.

During the interrogation of one of J.K.'s henchmen, Vijay learns that J.K. has plans to leave India using fake credentials.

Following up on the tip, Vijay arrives at the airport, and ultimately succeeds in killing J.K., who is in a disguise, thereby avenging his mother's death.

Ashwini rushes towards him, and in a tearful goodbye, Vijay realizes his mistake and asks for forgiveness, saying to his father that he always loved him very much.

The scene cuts to the present, and a tearful Ashwini reiterates to Ravi, asking him whether he wants to follow his decision of being a police officer.

The film was critically acclaimed and won many accolades listed below: The role of Vijay was initially to be played by Raj Babbar and he took an advance, but after Amitabh Bachchan showed interest in the role, Babbar was dropped.