资料来源 : pyDict

前的,以前的,在先的

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

Prevenient \Pre*ven"i*ent\, a. [L. praeveniens, p. pr.]
   Going before; preceding; hence, preventive. ``Prevenient
   grace descending.'' --Milton.

资料来源 : WordNet®

prevenient
     adj : in anticipation [syn: {anticipatory}]