Here are some options, depending on the meaning:
If "thalakarangi" refers to the plant:
* Indian Coral Tree: This is the most common translation, as it refers to the scientific name, Erythrina indica.
* Flame Tree: This is a more general term for a tree with bright red flowers.
If "thalakarangi" refers to the flower:
* Coral flower: This is a general term for any flower with a bright red color.
* Indian Coral Tree flower: This specifies the flower of the particular plant.
If "thalakarangi" refers to the red color:
* Crimson: This is a deep red color, similar to that of the flower.
* Scarlet: This is another word for a bright, vibrant red.
If "thalakarangi" refers to the specific meaning in a particular context:
* You might need to provide more information about the context to get a more accurate translation.
Ultimately, the best English word to use will depend on the specific context and the intended meaning.