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.)‎^[1], 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 […]
  [of Jesus Christ,] / 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.