IPA: /ˈθiːsɪs/
KK: /ˈθisɪs/
A written work that presents an original idea or argument, usually required for a higher academic degree after research.
She spent years writing her thesis on climate change and its effects on biodiversity.
Thesis → It is derived from the Greek word "thesis" (meaning a placing or proposition). The word refers to a statement or proposition that is put forward for consideration or argument.
Think of a 'proposition' or 'statement' being 'placed' for discussion — that's what a thesis is.