资料来源 : pyDict

[单词前缀] 表示加强语气及“on","into","in","to","of","from""out","not"等含义

资料来源 : Webster's Revised Unabridged Dictionary (1913)

A- \A-\
   A, as a prefix to English words, is derived from various
   sources. (1) It frequently signifies on or in (from an, a
   forms of AS. on), denoting a state, as in afoot, on foot,
   abed, amiss, asleep, aground, aloft, away (AS. onweg), and
   analogically, ablaze, atremble, etc. (2) AS. of off, from, as
   in adown (AS. ofd[=u]ne off the dun or hill). (3) AS. [=a]-
   (Goth. us-, ur-, Ger. er-), usually giving an intensive
   force, and sometimes the sense of away, on, back, as in
   arise, abide, ago. (4) Old English y- or i- (corrupted from
   the AS. inseparable particle ge-, cognate with OHG. ga-, gi-,
   Goth. ga-), which, as a prefix, made no essential addition to
   the meaning, as in aware. (5) French [`a] (L. ad to), as in
   abase, achieve. (6) L. a, ab, abs, from, as in avert. (7)
   Greek insep. prefix [alpha] without, or privative, not, as in
   abyss, atheist; akin to E. un-.

   Note: Besides these, there are other sources from which the
         prefix a takes its origin.