Where does “見込み違い” come from?

見込み違い (Japanese) comes from Japanese 違い, from Japanese 違う, from Japanese 交う — together, past each other.

見込み違い (Japanese): miscalculation

Definitions

  1. miscalculation

Ancestry of “見込み違い”, step by step

見込み違い traces back through two separate lines of ancestry.

via Japanese 違い

StepLanguageWordMeaning
1Japanese違いdifference; difference, discrepancy; being...
2Japanese違うto be different; to differ (from something)
3Japanese交うtogether, past each other

via Japanese 見込み

StepLanguageWordMeaning
1Japanese見込みchance, expectation, fear, hope, probability
Every word from Japanese 交うEvery word from Japanese 違うEvery word from Japanese 違い
見込み違い — Etymology, Origin & Word History | Etymology Explorer