Reptilian
来自Big Physics
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late Middle English: from late Latin, neuter of reptilis, from Latin rept- ‘crawled’, from the verb repere .
wiktionary
From reptile + -ian, replacing earlier reptilious and adjectival reptile.
etymonline
reptilian (adj.)
"of, resembling, or characteristic of reptiles," 1835, from reptile + -ian. Transferred meaning "malignant, cold, underhanded" is by 1859.