Haphazardly means in a random or uncontrolled manner. The way that the furniture was arranged was haphazardly, and it was not very organized.
When someone is sated, they are completely satisfied. They have had enough food or drink, and they don't want any more.
A chemoreceptor is a receptor in the nose that detects smells. It is responsible for detecting smells in the environment and sending signals to the brain.
To visualise is to picture something in your mind. You can visualise yourself doing whatever it is that you want to do.
Permanent means that something will continue to exist for a long time. The flowers in the garden are permanent, because they will be there long after the people who planted them are gone.
To outsmart someone is to beat them at their own game. You can outsmart someone by using their own rules against them, or by using your own skills to advantage.
To empathise is to feel the same emotions as someone else. Empaths are usually very good at understanding other people's feelings and motivations.
To obsess is to think about something obsessively. You might obsess about your work, or you might obsess about your partner.