This is the 2394th most frequent Chinese word.
否则
"Otherwise."
The word "否则" is used to introduce the potential consequence if the condition stated before it is not fulfilled.
你必须认真完成作业,否则老师会生气。
You must complete your homework seriously, otherwise the teacher will be angry.
Here, "否则" presents the outcome of not adhering to the imperative suggestion provided in the preceding clause.
赶快穿上外套,否则你会感冒。
Hurry up and put on your coat; otherwise, you will catch a cold.
In this sentence, "否则" connects the urgency action required due to the potential negative result of inaction.