Television Tropes and Idioms

Merriam-Webster gives a definition of "trope" as a "figure of speech." In storytelling, a trope is just that — a conceptual figure of speech, a storytelling shorthand for a concept that the audience will recognize and understand instantly.

Above all, a trope is a convention. It can be a plot trick, a setup, a narrative structure, a character type, a linguistic idiom... you know it when you see it. Tropes are not inherently disruptive to a story; however, when the trope itself becomes intrusive, distracting the viewer rather than serving as shorthand, it has become a cliché.

- Television Tropes and Idioms

1.02 Between Friends

Ares: We'll soften him up where's he's weakest: his pathetic mortal feelings.

• Classic example of the trope The Power of Friendship. Ares decides that Hercules's weakest point is his "pathetic mortal feelings", and sends Strife to attack Hercules through his best friend, Iolaus. In the end, it is Iolaus shouting Herc's name during Hercules and Strife's final showdown that distracts Strife long enough for Hercules to win the fight.