Comparative Degree: 더 / 덜 / 훨씬 (more, less, far)

English changes the shape of the adjective to compare: big → bigger → biggest, good → better → best. Korean does none of that. The descriptive verb stays exactly as it is, and you place a degree adverb in front of it: 더 (more), 덜 (less), 훨씬 (much / far), and for the top of the scale 제일 / 가장 (most). This analytic system is one of the tidiest corners of Korean grammar — once you stop looking for a "-er" ending, comparison becomes pure arithmetic with three little words.

The core idea: the adjective never changes

Take 크다 ("to be big"). English would reshape it; Korean just prepends an adverb:

• 커요 — "it's big"
• 더 커요 — "it's bigger" (more big)
• 제일 커요 — "it's the biggest" (most big)

The verb 커요 is identical in all three. This is the single most important habit to build: to say "more/less/most X," find the adverb, not a new ending.

더 ("more") and 덜 ("less") are perfect opposites and both attach the same way. 더 is extremely common; 덜 is the underused gem that lets you say "less _" in one word instead of an awkward paraphrase.

훨씬: cranking up a comparison

훨씬 means "much / far / by a long way," and it is a comparative intensifier — it boosts a comparison, not a plain quality. It very commonly teams up with 더 as 훨씬 더 ("much more").

Comparing against a standard: the particle 보다

To say "bigger than X," Korean marks X — the standard you compare against — with the particle 보다 ("than"), attached directly to that noun. Because 보다 already carries the meaning "compared to / more than," the adverb 더 is often optional: the comparison is clear from 보다 alone.

Notice the first sentence has no 더 at all — 저보다 커요 already means "bigger than me." Adding 더 (저보다 더 커요) is fine and slightly more emphatic, but never required. The particle does the comparative work; the adverb only reinforces it. For the full behaviour of this particle, see 보다: than, and for the adjective-side treatment, comparison with 보다.

Word order matters for meaning. 보다 attaches to the thing you are measuring against. Flip which noun carries 보다 and you flip the comparison:

• 저는 동생보다 커요 = I am taller than my sibling.
• 동생은 저보다 커요 = my sibling is taller than me.

The superlative: 제일 / 가장 (most)

For the top of the scale, use 제일 or 가장 ("most"). They are near-synonyms: 가장 is a touch more formal and written; 제일 is a touch more colloquial. Both simply go in front of the unchanged adjective.

The set to compare within is usually marked with 에서 ("among / in": 우리 반에서 = "in our class," 셋 중에서 = "among the three"). The superlative works on verbs of preference too:

Quick reference

English → Korean: stop hunting for "-er"

English fuses the comparison into the adjective (bigger, better, worse), so English speakers instinctively look for a Korean ending that does the same — and there isn't one. Korean is fully analytic here: the adjective is frozen, and 더 / 덜 / 제일 carry the whole comparative meaning as separate words, the way English more and most work for long adjectives (more beautiful, most beautiful). If you always render "more X" as 더 + X and "than Y" as Y보다, you will be right every time.

Common Mistakes

1. Expecting the adjective to change for "bigger." The plain adjective only means "big"; you must add 더 for "bigger."

2. Using 훨씬 as plain "very." 훨씬 needs a comparison; it can't intensify a bare quality.

3. Attaching 보다 to the wrong noun and reversing the comparison. 보다 marks the standard — the "than" noun.

4. Using 안 (not) where you mean 덜 (less). "Less spicy" is 덜 매워요; 안 매워요 is "not spicy" — a different claim.

Key Takeaways

• Korean comparison is analytic: the adjective never changes shape. Prepend 더 (more), 덜 (less), or 제일 / 가장 (most).
• 훨씬 intensifies a comparison ("much more"), not plain degree — usually as 훨씬 더.
• Mark the standard of comparison with 보다 ("than") on that noun; 더 is optional because 보다 already implies "more."
• 보다 attaches to the "than" noun — get that noun wrong and the comparison flips.