The interpretation of word comfort might be subjective. It's something which you could approach without giving much thought about, without fearing the judgement of others as well as the conflict inside of you. People might find comfort in food, place, situation or sleep.
When it comes to me, comfort is derived from person, who is very close to my heart, whom I can trust without giving a second thought, whom I can share my feelings without the fear of being judged. The name of that person is Asmita. She hates it when I call her by her first name though. I am not sure why.
She is the only person in this world which I could claim as mine, and truly mine. She is my comfort, my home, and of course my entire world. My love for her has only moved towards an upward trajectory from the day I met her. People say you don't achieve great things from the comfort zone. However, having comfort in the form of her, itself feels like the biggest achievement for me.