Reckoning (noun)

1. The process of calculating or determining something, often as a final step in a process.
2. A settling of accounts, especially a final judgment or accounting for one's actions or deeds.
3. A realization or understanding of the true nature of something, often as a result of past events or experiences.

Origin:

From the verb to reckon (to calculate or determine), from old english recenian (to calculate, consider), from proto-germanic *rekōnijaną (to count, consider), from proto-germanic *rekōną (count, number), from proto-indo-european *rek- (to count, rule).

Examples:

1. The company's financial reckoning revealed that they were in debt.
2. The day of reckoning for his actions finally came.
3. The reckoning of the votes was a long and tedious process.
4. The reckoning of the cost of the project came as a shock to the management.
5. The reckoning of the impact of climate change on the region was sobering.