-시 (Subject Honorific)

The -시 suffix is a subject honorific marker that raises the grammatical status of the person performing the action or possessing the quality. This is fundamentally different from English, where we lack this concept entirely.

In English, we show respect primarily through word choice and tone—we might say "Mr. Smith is coming" or "Would you like to sit?" But the grammar itself doesn't change. Korean, however, embeds respect directly into the verb itself. When someone senior, older, or worthy of respect performs an action, you don't just choose polite words; you literally transform the verb structure by inserting -시 before the ending.

Here's the key mindset shift: English speakers think of verbs as static actions that happen to be done by someone. Korean speakers think of verbs as relationship-dependent actions—the verb itself changes based on WHO is doing it. If your teacher eats, the verb structure must reflect that higher status. If you eat, it doesn't. This is not optional politeness; it's grammatical obligation once you recognize someone's higher social standing.

The -시 typically appears before tense markers and endings: 먹다 (to eat) becomes 먹으시다 (for an honored person to eat), 오다 (to come) becomes 오시다 (for an honored person to come). When you combine this with politeness endings like -어요, you get 먹으셔요 or 오셔요. The verb doesn't just carry the action—it announces the social relationship in the grammar itself.