dilogy
Ambiguous or equivocal speech or discourse.
countable, uncountable
Repetition of a word or phrase.
countable, uncountable
A series of two related works.
countable
why tragedy took the form of a trilogy — not a dilogy, tetralogy, or single drama
Where it comes from
From Latin dilogia, from Ancient Greek διλογία (dilogía, “repetition”), from δίς (dís, “twice”) + -λογία (-logía, “-logy”).
Adapted from the Wiktionary entry dilogy (CC BY-SA 4.0).