/ʌnˈduː ˈɪn.flu.əns/ – noun
Definition: Áp lực không hợp lý.
A more thorough explanation: where a person takes advantage of their position of power over another person to get that person to act in a way that no reasonable person would act. Undue influence can be used as a defence in contract law if it can be proved that a professional took advantage of their position to get the defendant to agree to an unreasonable contract term
Example: One way of challenging a will is by demonstrating undue influence – that there was an element of coercion.