D defs.my
Entry 1 sense Webster, 1913

Sponsional

/(-al)/ · Spon·sion·al · IPA
01 a. Of or pertaining to a pledge or agreement; responsible.
  1. 1.
    Of or pertaining to a pledge or agreement; responsible.[R.]
    “He is righteous even in that representative and sponsional person he put on.” — Abp. Leighton.