This is the 417th most frequent Bulgarian word.
сам
"Сам" in Bulgarian means "alone" or "by oneself."
Here, 'сам' emphasizes the subject 'той' (he), meaning that the subject performed the action independently or without assistance.
Той сам си направи новата къща.
He built his new house on his own.
In this usage, 'сам' precedes the verb 'решиш' (solve), stressing the responsibility to act lies solely with the subject.
Трябва сам да решиш този проблем.
You need to solve this problem by yourself.
In this sentence, 'сам' is an adjective modifying the subject 'аз' (I), meaning 'alone' or 'by oneself', indicating that the action was performed without company.