misstriken.
/ˈmɪsstrʌɪk/, U.S. /ˈmɪ(s)ˌstraɪk/ A badly aimed or executed blow or stroke. Also: the result of such an error, as a misstruck coin, etc.
ΚΠ
1961 Webster's 3rd New Internat. Dict. Eng. Lang. Misstrike, a coin whose design is off center.
1983 R. H. Winnick Lett. Archibald MacLeish p. xviii I have silently corrected..such errors as are clearly mere mis-strikes of the typewriter keyboard.
1988 San Diego Union-Tribune (Nexis) 30 Jan. b11 29 substitutes would be warming up in the bullpen in case any of the starting 88 pianists made a misstep—or misstrike.
2000 Do-It-Yourself Retailing (Nexis) 1 May 51 The hammerhead's large cross-section and extra-large striking face minimizes the possibilities of misstrikes.
This is a new entry (OED Third Edition, June 2002; most recently modified version published online March 2022).
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n.1961