hypothesize
hy·pot·he·size
verb
1.
to believe especially on uncertain or tentative grounds
- “Scientists supposed that large dinosaurs lived in swamps”
Origin
From hypothesis + -ize.
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WordNet 2.1 (Princeton University). Wiktionary (CC BY-SA). CMU Pronouncing Dictionary. WordNet 2.1 Copyright Princeton University. All rights reserved. Wiktionary content is available under the Creative Commons Attribution-ShareAlike Licence.