This is the 63rd most frequent Spanish word.
mismo
"Same" or "self," depending on context.
The word 'mismo' emphasizes that the subject (yo) is the one who will perform the action.
Yo mismo haré la tarea.
I myself will do the homework.
The word 'mismo' indicates that there is a shared or identical location for both subjects.
Vivimos en el mismo edificio.
We live in the same building.
The word 'mismo' emphasizes exactness or precision regarding the referenced object.