Possum
来自Big Physics
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early 17th century: shortening of opossum.
wiktionary
Derived from opossum by apheresis.
etymonline
possum (n.)
American marsupial mammal, 1610s, shortened form of opossum (q.v.). It is nocturnal, omnivorous, and when caught or threatened with danger feigns death; hence the phrase play possum "feign death when threatened," attested by 1822.
