sud·den·ness
noun/ˈsʌdnnəs/
/ˈsʌdnnəs/
[uncountable]- the fact that something happens or is done quickly and unexpectedly
突然;猛地 - The suddenness of the attack left no time to launch lifeboats.
袭击的突然性使得救生艇来不及下水。
- The suddenness of the attack left no time to launch lifeboats.