Difficulty retargeting (难度调整 nándù tiáozhěng) refers to the adjustment (调整 tiáozhěng) in the difficulty level. After every 2016 blocks (two weeks later), the bitcoin network will adjust the difficulty of mathematical puzzles based on the calculation time and computing power of the previous 2016 blocks and reduce or increase the difficulty by increasing or lowering the threshold of mathematical solutions. The calculation time of each block is maintained in the range of about 10 minutes. Also see: difficulty; difficulty target.

- 难度 (nándù) derives from

难 (nán) as in hard (难的 nándē), ill (难受 nánshòu) or blame (责难 zénàn); 度 (dù) as in degree (度数 dùshù), climate (温度 wēndù) or generous (大度 dàdù).

难度 (nándù) as in course difficulty (课程难度 kèchéng nándù) or degree of difficulty (难度值 nándù zhí).

- 调整 (tiáozhěng) as in plan adjustment (计划调整 jìhuà tiáozhěng), temperature adjustment (温度调整 wēndù tiáozhěng) or status adjustment (状态调整 zhuàngtài tiáozhěng).

Difficulty retargeting (难度调整 nándù tiáozhěng) word examples:

- Difficulty retargeting plan (难度调整计划 nándù tiáozhěng jìhuà).
- Bitcoin’s difficulty retargeting (比特币难度调整 bǐtèbì nándù tiáozhěng).