preterintentional
pret·er·in·tent·ion·al
Additional to or beyond what was intendedAdditional to or beyond what was intended.
UK/ˌpɹiːtəɹˌɪnˈtɛnʃn̩(ə)l/US/ˌpɹitəɹˌɪnˈtɛn(t)ʃ(ə)nəl/
Meaning
2 senses(not comparable, rare)Additional to or beyond what was intended.
(not comparable, rare)Of a crime: more serious than the lesser crime that the perpetrator intended to commit instead.