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Webster 1913 Edition

Noun.

[See

A sharp-pointed instrument; also, an eelspear.

[Prov. Eng.]

Pique; offense.

[Obs.]

D. Rogers.

pritch ‎(plural pritches)

(Britain, dialect, obsolete) A sharp-pointed instrument.
(Britain, dialect, obsolete) An eelspear.
(Britain, dialect, obsolete) pique; offence
- D. Rogers, Naaman the Syrian
  The least word uttered awry, the least conceit taken or pritch, the breaking in of a cow into their grounds, yea, sheep or pigs is enough to make suits, and they will be revenged.

From Middle English pricche, assibilated variant of Middle English prike ‎(“prick”). More at prick.

pritch ‎(third-person singular simple present pritches, present participle pritching, simple past and past participle pritched)