Deviation
Departure
noun, verbal noun
If you deviate from the plan and escape from it, that's a serious deviation and could ruin everything! Stick to the plan! Stop deviating!
This is a jukugo word that uses the on'yomi readings of the kanji. You should be able to read this on your own.
任務を逸脱する行為は慎み給え。
Please refrain from tasks that deviate from the mission.