This is the 5763rd most frequent Chinese word.
同济
"同济" means "mutual aid" or "to help each other."
In this sentence, '同济' means 'to support each other and face challenges together'.
我们一起同济困难时期，互相支持。
We face difficult times together, supporting each other.
Here, '同济' refers to the 'spirit of mutual support and cooperation'.
在灾难中，同济精神能让人们团结起来，渡过难关。
In times of disaster, the spirit of mutual support brings people together and helps them overcome hardships.
In this case, '同济' is used as a proper noun, referring to the name of Tongji University in China.