weigh in
Have a certain weight (in sports like boxing)
Enter an argument forcefully
weigh against
To be disadvantageous to someone.
weigh down
To act as a ballast for.
To be too much for someone to cope with.
weigh out
Measure a certain amount of something by weight
weigh down on
Burden with responsibilities, duties, etc
weigh on
Make someone consider carefully
weigh in on
Enter an argument or discussion to express a strongly felt idea
weigh up