This is the 349th most frequent Romanian word.
săi
The Romanian word "săi" means "his," "her," or "their" (plural possessive).
Here, 'săi' is a possessive pronoun meaning 'his.' It connects to the noun it describes, aligning in gender and number.
Fratele săi îi cumpără un cadou.
His brother is buying him a gift.
Here, 'săi' is a combination of 'să' (to/make) and 'i,' indicating a subjunctive mode directive.
Profesorul a cerut săi respecte regulile.
The teacher asked for them to respect the rules.
In this instance, 'săi' is a misspelled form of 'să-i,' which means 'to tell him/her,' functioning as an objective clitic of indirect speech.