Not all Toxic relationships are physically abusive in nature and yes all physically abusive relationships are toxic in nature.

The thing about toxicity is it is relative and often defined by one’s tolerance of a few parameters in the relationship. For example it might be considered toxic if the partner constantly ridicules genuine concerns about a relationship or an incident in the relationship. Why is it toxic? It makes one of the person feel little and uncomfortable from time to time. It is also apt to note the difference between a toxic person or a toxic relationship. Say a person themself brings down everyone in question, in various interaction, the person is deemed as toxic. Say a set of people when coming together in life generally on a particular instance or a prolonged partnership, repeated patterns of one ridiculing the others opinion is deemed as toxic environment or relationship in this instance.

I think the word toxic has a variety of levels of meaning. It can mean a toxic substance that can kill you, or a toxic plant which will kill you if you eat a 1000 such plants. So even though both are labelled toxic, the plant you keep at home, and the toxic substance probably not. So when we say someone’s behaviour is toxic, we mean a particular aspect of the person’s behaviour, and it is highly impossible for a person to be toxic due to one toxic behaviour. Because for it to be toxic that behaviour has to happen daily. Which in most cases it doesn’t. So a person with a toxic behaviour necessarily isn’t a toxic person.