hypothesis (n.)youdaoicibaDictYouDict[hypothesis 词源字典]
1590s, from Middle French hypothese and directly from Late Latin hypothesis, from Greek hypothesis "base, basis of an argument, supposition," literally "a placing under," from hypo- "under" (see sub-) + thesis "a placing, proposition" (see thesis). A term in logic; narrower scientific sense is from 1640s.[hypothesis etymology, hypothesis origin, 英语词源]