IPA: /ˌmɪs.kəm.pjuˈteɪ.ʃən/
KK: /mɪsˌkɒmpjuˈteɪʃən/
An error made during a calculation or computation.
The engineer realized there was a miscomputation in the project budget.
Miscomputation → It is formed from "mis-" (meaning wrong or badly) and "computation" (from Latin "computatio", meaning calculation). The word refers to a calculation that is done incorrectly or wrongly.
Think of 'mis-' meaning wrong and 'computation' referring to calculation — so miscomputation means a wrong calculation.