This is the 1504th most frequent Chinese word.
突
"突" means "to dash forward," "suddenly," or "to protrude."
The word '突' is used as part of '突然', an adverb meaning 'suddenly', signifying an abrupt action or occurrence.
他突然站起来，然后迅速离开了房间。
He suddenly stood up and quickly left the room.
Here, '突' appears in '突袭', a noun meaning 'ambush', indicating a swift, unexpected attack or action.
孩子们喜欢玩突袭的游戏。
The children love playing the ambush game.
In this case, '突' is part of '突发', a verb meaning 'to erupt suddenly', describing an unexpected and sudden event.