Webster's Revised Unabridged Dictionary · 1913

Essoin

Essoin , noun

[Old French essoine, essoigne, French exoine, Latin essonia, exonia; pref. ex- (Latin ex from) + sunnis, sunnia, sonia, hindrance, excuse. Compare Icelandic syn refusal, synja to deny, refuse, Gothic sunja truth, sunjōn to justify, Old Saxon sunnea impediment, Old High German sunna.]

1.
(Eng. Law) An excuse for not appearing in court at the return of process; the allegation of an excuse to the court.
2.
Excuse; exemption. [Obsolete]
From every work he challenged essoin. — Spenser
Collocations (1)
Essoin day (Eng. Law) , the first general return day of the term, on which the court sits to receive essoins. — Blackstone

Also: Essoign

Essoin , transitive verb

[Old French essoinier, essoignier, essonier, Late Latin essoniare, exoniare. See Essoin, n.]

(Eng. Law) To excuse for nonappearance in court.
I 'll not essoin thee. — Quarles