IPA: /ˈtriːtɪs/
KK: /ˈtritɪs/
A detailed written work that discusses a specific subject in a thorough and organized way.
The scholar published a treatise on the effects of climate change on agriculture.
Treatise → It is formed from 'tractatus' (from Latin, meaning a handling or treatment) and the suffix '-ise' (indicating a process or action). A treatise is a formal written work that handles or discusses a particular subject in detail.
Think of a formal document that 'handles' ('tractatus') a specific topic — that's what a treatise does.