Does anyone have any idea if there is a term to describe the technique that many Gothic authors use, especially Mary Shelley with the character of Victor Frankenstein, where the speaker claims that "there are no words to express the pain I felt that night", or "nobody can understand the agony I went through". Something along the lines of paralipsis or apophasis or ennoia (?) but I wasn't sure that these quite fit.

A lecturer once made it our weekly assignment to discover this term but I didn't return for the answer and have regretted it ever since!