Deactivation

1. Process of making something inactive or ineffective (Merriam Webster English Dictionary).
2. If someone deactivates an explosive device or an alarm, they make it harmless or impossible to operate. (Collins English Dictionary).
3. Breaking up a military unit (by transfers or discharges). (Vocabulary English Dictionary).

Sources:

Merriam-Webster. (2024) Merriam-Webster, Incorporated. Weaken. In Merriam-Webster.com dictionary. Retrieved from https://www.merriam-webster.com/dictionary/weaken

Collins English Dictionary. HarperCollins Publishers. Retrieved from https://www.collinsdictionary.com/dictionary/english/deactivate

Vocabulary.com. (n.d.). Deactivation. In Vocabulary.com Dictionary. Retrieved from https://www.vocabulary.com/dictionary/deactivation