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Webster 1913 Edition

Adj.

[L.

adviens

, p. pr.]

Coming from outward causes; superadded.

[Obs.]

Adj.

Advening; coming from outward causes.

advenient ‎(comparative more advenient, superlative most advenient)

(now rare) Caused by outside forces; coming from without; external, additional.
- 1646, Thomas Browne, Pseudodoxia Epidemica, I.3:
  Lastly, being thus divided from truth in themselves, they are yet farther removed by advenient deception.

advenient