1. As a fireplace:
* നിലവിളക്ക് (nilavilakku): This is the most common and literal translation, meaning "floor lamp" or "hearth lamp". It refers to the traditional clay lamp placed on the floor or a raised platform, which is used for cooking and warmth.
* നിലത്തു കത്തിക്കുന്ന സ്ഥലം (nilathu kattikkunna sthalam): This means "the place where fire is lit on the floor."
* ചൂള (choola): This word refers to a stove or oven, which can be used as a hearth.
2. As a metaphorical "home" or "center":
* ഗൃഹം (griham): This means "home" or "house."
* ഹൃദയം (hṛdayam): This means "heart," and can be used metaphorically as the center of a person's life or emotions.
The best translation would depend on the specific context in which you are using the word "hearth."