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awake [awake 词源字典]: awake: [OE] Awake was formed by adding the intensive prefix ā- to the verb wake (in Old English wacan or wacian, related to watch, and also ultimately to vegetable, vigil, and vigour). The adjective awake arose in the 13th century; it was originally a variant form of the past participle of the verb.
=> vigil, wake, watch[awake etymology, awake origin, 英语词源]
awake (v.): a merger of two Middle English verbs: 1. awaken, from Old English awæcnan (earlier onwæcnan; strong, past tense awoc, past participle awacen) "to awake, arise, originate," from a "on" + wacan "to arise, become awake" (see wake (v.)); and 2. awakien, from Old English awacian (weak, past participle awacode) "to awaken, revive; arise; originate, spring from," from a "on" (see a (2)) + wacian "to be awake, remain awake, watch" (see watch (v.)).

Both originally were intransitive only; the transitive sense being expressed by Middle English awecchen (from Old English aweccan) until later Middle English. In Modern English, the tendency has been to restrict the strong past tense and past participle (awoke, awoken) to the original intransitive sense and the weak inflection (awakened) to the transitive, but this never has been complete (see wake (v.); also compare awaken).
awake (adj.): "not asleep," c. 1300, shortened from awaken, past participle of Old English awæcnan (see awaken).
awaken (v.): Old English awæcnan (intransitive), "to spring into being, arise, originate," also, less often, "to wake up;" earlier onwæcnan, from a- (1) "on" + wæcnan (see waken). Transitive meaning "to rouse from sleep" is recorded from 1510s; figurative sense of "to stir up, rouse to activity" is from c. 1600.

Originally strong declension (past tense awoc, past participle awacen), already in Old English it was confused with awake (v.) and a weak past tense awæcnede (modern awakened) emerged and has since become the accepted form, with awoke and awoken transferred to awake. Subtle shades of distinction determine the use of awake or awaken in modern English. Related: Awakening.
re-awaken (v.): also reawaken, 1810, from re- + awaken. Related: Reawakened; reawakening.