Buri= meaning old women, the name of our main protagonist. 

Pathor= Rocks, or boulders.

Onushtan= Party, or event

Gorur mangsho= Cow meat, cooked of course. 

Bhoot= ghosts

Petni (the ghost that appered ep 1) = female ghosts who died with unsatisfied desires, or died unmarried and unhappy.

Mamdo bhoot= Belived to be the ghosts of Muslims, They choose to kill off people by twisting their necks. (yes, it appears bhoot like cutting or twisting necks off.)

Kagol= Buri's half-sister (Not sure how relevent she will be)

Description of kagol: 

black, long healthy hair, red eyes, pretty face (whatever you imagine, different beauty standerds ya know?), Gap teeth which Buri finds to be the most endearing feature of Kagol, and obviously since "Kagol" means... well... pencil eyeliner :') or Khol, from arabic. It's a beautiful name in Bangla I swear, she (kagol) wears khol around her eyes. She has a petite structure (short lol) and she's kinda chubby. (thick thighs save lives) (BUNNY CHEEKS) she's roughly 158.75 cm tall (or 5,2.5ft to be specific)

Buri= I actually never put much thought into her design even though she's the main character. All I know is that I always wanted her to have curly black hair like mine, which is cut short into a pixie cut. The beauty standards differ from country to country but in bangladesh, long hair like Kagol's is most well-loved, but I feel the pixie cut will match her personality more then long black hair will. Buri is 5,9ft or 175.26cm tall (I want her to be tall) She has bunny cheeks and a more chubby body type like her half-sister, but shes leaning more towards her dad's side (which is why she's tall) and has pure black irises. Like literally pure black, without a glint or shine. You can take the rest up to your imagination from here.

Eyes are the windows to your soul, eh? Yeah exactly. Buri has pitch black eyes. which are practically unheard of in this world because everyone has eyes assosiated with the colonies or areas they live in. Depending on the proximity to the bhoot infested areas. the redder your eyes the closer you are to these areas and the whiter your eyes the farther you are. black has never been seen other then Buri's late father. which is why it's unheard of. She's the only person shes ever heard of herself with black eyes.