Hypothesis: The Greek root 'thesis' (a… | etymologist.ai
hypothesis
/haɪˈpɒθ.ə.sɪs/·noun·1596·Established
Origin
From Greek 'hupo-' (under) + 'thesis' (placing) — a proposition 'placed under' an argument as its foundation.
Definition
A supposition or proposed explanation made on the basis of limited evidence as a starting point for further investigation.
The Full Story
Greek16th centurywell-attested
From Latin hypothesis, borrowed from Greek hypothesis (foundation, base, supposition), composed of hypo (under, beneath) + thesis (a placing, a proposition). Greek hypo derives from PIE *upo (under, below), which also produced Latin sub (under), Sanskrit upa (near, under), English "up" (via a semantic inversion in Germanic), and English "sub-" (via Latin). Greek thesis comes from theroot
with the scientific method: a hypothesis is a testable proposition placed beneath an investigation as its foundation. The word preserves the architectural metaphor: hypotheses support theories the way foundations support buildings. If the foundation proves unsound, the structure above must be rebuilt. Key roots: ὑπό (hupo-) (Greek: "under"), *dʰeh₁- (Proto-Indo-European: "to put, to place").