quword
趣词
Word Origins Dictionary
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polyunsaturated (adj.)
1921, from
poly-
+
unsaturated
.
supersaturated (adj.)
1778, past participle adjective from verb
supersaturate
(1756), from
super-
+
saturate
(v.).
unsaturated (adj.)
1756, from
un-
(1) "not" + past participle of
saturate
(v.).