thesis

From Late Middle English thesis, also borrowed directly from Latin thesis ("proposition; lowering of the voice"), from Ancient Greek θέσις (thésis, "arrangement, placement, position"), from τίθημι (títhēmi, "to place, put, set"), ultimately from Proto-Indo-European *dʰeh₁- ("to do; to place, put").

The sense of a "proposition or statement supported by arguments" was adopted from antithesis, while the sense of an "initial stage of reasoning" was first used by Fichte and later applied to Hegel's dialectical method.

English thesis is a doublet of deed, both tracing back to the same Proto-Indo-European root *dʰeh₁-, meaning "to do" or "to place."