effectuous

adjective2

1. •
   (no longer used) Effective; efficacious.

   • As if that piece were sweeter which the wolf had bitten, or the raven had pick'd, and more effectuous : — 1633
2. •
   (no longer used) Heartfelt; emotional.

   • Rycht excellent, rucht hie and mychty prince, oure derrest brother and uncle, we commend ws unto yow in oure maist effectuous and heartlie manere. — 1541