The spectrum of a healthy relationship to an unhealthy relationship includes the following four stages:

The following 4 stages are Healthy, Pressure, Coercion and Force.

Thus, Healthy, Pressure, Coercion and Force can describe the spectrum of a relationship.

Learn more about healthy relationships: link

The base of healthy relationship is Respect, communication, trusting, honesty

Explanation:

Respect: culture, beliefs and boundaries are valued. It demonstrates the high esteem where you hold each other.  

Trust:  Trust in both and trust also be earned. It makes life beautiful  

Honesty: Honest with each other make relationship healthier.

Equality: we have to understand the importance in every aspect and just take the decision together.    

In other side Disrespecting, not communication, Not Trusting, Dishonesty these are the reason of unhealthy relationship  

answerrunning;