What word describes an effect or influence?

If something is made worse, it is said to be:

To carry out a plan or action is to:

When someone strongly suggests something without directly stating it, they:

To force something upon someone is to:

Reducing someone to poverty means to:

A reason to do something, often to encourage a particular action, is called:

What word describes something that continues without pause?

Which word best fits the description of a minor part or something occurring by chance?