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Webster 1913 Edition

Noun.

One who, or that which, scares another; specifically, a person stationed to prevent the escape of the deer, at a hunt. See

[Obs.]

One who blenches, flinches, or shrinks back.

Noun.

That which frustrates.

blencher ‎(plural blenchers)

(obsolete) One who, or that which, scares another; specifically, a person stationed to prevent the escape of the deer during a hunt.
(obsolete) One who flinches or shrinks back.