scepticyoudaoicibaDictYouDict[sceptic 词源字典]
sceptic: [16] The Greek verb sképtesthai meant ‘examine, consider’ (it was descended from a base *skep- which was related to *skop-, source of English scope, and may have been a reversed version of *spek-, from which English gets spectator, speculate, etc). From it was derived the adjective skeptikós, which was applied to various schools of philosophy (particularly that of Pyrrho of Elis) which stressed the need for careful examination of a proposition, starting from an attitude of doubt, before accepting it.

The word passed via Latin scepticus and French sceptique into English as sceptic, by which time it had acquired broader connotations of ‘initial doubt’.
=> scope[sceptic etymology, sceptic origin, 英语词源]
sceptic (n.)youdaoicibaDictYouDict
chiefly British English spelling of skeptic (q.v.). Related: Sceptical; sceptically; scepticism.