Also/Only (~also, only)

The core insight: English expresses scope (what's included or excluded) mainly through word order and special adverbs. Korean uses particles — tiny grammatical units attached to nouns — to do this work. This is why 한국어 feels so different to English speakers.

When you add 도 to a noun, you're saying that noun is included in a set that already exists in the mind. "I ate rice. I also ate soup" — the 도 tells listeners "this is ANOTHER item in the group." English handles this with the adverb "also" and word order, but Korean attaches the concept directly to the noun itself with a particle.

Conversely, 만 means only that noun, nothing else in that category. "I have money only" means money and nothing else — perhaps not time, not energy, but money alone. English needs the adverb "only" placed carefully, but Korean locks the exclusion onto the noun with a particle. The particle makes the boundary crystal clear: 시간은 없어도 돈은 있어 ("I don't have time, but I have money only").

Why English speakers struggle: English relies on adverbs and word order. We say "Also, I like pizza" or "I like pizza too." Korean says 나는 피자도 좋아 — the 도 sticks to the noun and defines the scope right there. There's no separate word for "also"; the particle IS the emphasis. Similarly, English must say "I eat only rice" (adverb + noun), but Korean says 밥만 먹어 (noun + particle). The logic is more compact and efficient because the relationship between the noun and its scope lives in one grammatical unit.

Think of 도 and 만 as scope markers rather than adverbs. They're not floating words; they're attached badges that tell the listener which nouns belong in a set or stand alone.