different between subvene vs subvened

English

From Latin subveni? (“come to the aid of”), from sub (“under, up towards”) + veni? (“come”).

subvene (third-person singular simple present subvenes, present participle subvening, simple past and past participle subvened)

(intransitive) To arrive or happen so as to help or support.
- 1738-1741, William Warburton, Divine Legation of Moses demonstrated on the Principles of a Religious Deist
  A future state must needs subvene to prevent the whole edifice from falling into ruin.

subvened

Send