wasshen

Middle English

wasshen

To wash; to clean with liquid:
1. To immerse or soak in liquid.
2. (medicine) To clean a wound.
3. To make a pool of liquid clean.
(religion) To cleanse (e.g. from sin or disease).
- c. 1395, John Wycliffe, John Purvey [et al.], transl., Bible (Wycliffite Bible (later version), MS Lich 10.)‎, published c. 1410, Apocalips 1:5, page 117v; republished as Wycliffe's translation of the New Testament, Lichfield: Bill Endres, 2010:
  [⁊ of iheſu criſt] þat is a feiþful witneſſe .· þe firſte bigeten of deed men · ⁊ pꝛynce of kyngis of þe erþe / which louyde vs / ⁊ waiſchide vs fro oure ſynnes in his blood […]
  / who is a reliable witness, the firstborn of the dead, and sovereign over the rulers of the Earth, who loved us and cleansed us from our sins with his blood
To make usable by mixing with water.
(rare, medicine) To purge or evacuate.
(rare, of waves) To wash upon.

The variation between conjugation as a strong verb of class 6 and one of class 7 is parallel to that seen in waxen.
Weak forms of this verb are occasional in Middle English.

Conjugation of wasshen (strong class 6/7)

infinitive	(to) wasshen, wasshe
	present tense	past tense
1st-person singular	wasshe	wessh, wossh
2nd-person singular	wasshest	wesshe, wosshe, wessh, wossh
3rd-person singular	wassheth	wessh, wossh
subjunctive singular	wasshe	wesshe¹, wosshe¹
imperative singular	wasshe	—

plural²	wasshen, wasshe	wesshen, wesshe, wosshen, wosshe
imperative plural	wassheth, wasshe	—

participles	wasshynge, wasshende	wasshen, wasshe, ywasshe

¹Replaced by the indicative in later Middle English.
²Sometimes used as a formal 2nd-person singular.