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Webster 1913 Edition

Adj.

[Pref.

im-

not +

persuasible

: cf. OF.

impersuasible

Not persuasible; not to be moved by persuasion; inflexible; impersuadable.

Dr. H. More.

–

Imˊper-suaˊsi-bil′i-ty

(#)

Noun.

Adj.

[L. in and persuasibilis. See Persuade.]

Not to be moved by persuasion; not yielding to arguments.

impersuasible ‎(comparative more impersuasible, superlative most impersuasible)

Not persuasible; not to be moved by persuasion.
(Can we find and add a quotation of Dr. H. More to this entry?)