Korean was spoken long before Hangul was created in 1443 and publicly introduced in 1446. Native Korean vocabulary offers a window into the language’s history, but individual words have changed over time.
Here are ten beautiful native Korean words and historical forms. Some are everyday vocabulary; others are archaic or literary. Their inclusion does not mean that every form has remained unchanged for thousands of years.

하늘 [haneul] : sky

The native Korean word 하늘 means “sky.”
비 [bi] : rain

The native Korean word 비 means “rain.” Korean has many words for different kinds of rain. Here are two evocative examples.
여우비 [yeoubi] : rain on a clear day
The literal meaning of 여우비 is “fox rain,” and it means “rain on a clear day.” Folk stories connect sunshowers with foxes and weddings. The stories vary; they are folklore rather than a scientific explanation or a settled word origin.
이슬비 [iseulbi] : drizzle
“이슬 [iseul]” means “dew,” and “비 [bi]” means “rain.” 이슬비 indicates “drizzle,” fine, light rain.
고양이 [goyangi] : cat

The native Korean word 고양이 means “cat.” A kitten can be called 새끼 고양이 or 아기 고양이. The existence or absence of a separate word for a baby animal does not tell us how popular that animal was in the past. For many common animals, Koreans use different terms to indicate their babies. The following words are examples.
강아지 [gangaji] : puppy
강아지 refers to a baby “개 (dog).”
병아리 [byeongari] : chick
병아리 refers to a baby “닭 (chicken).”
송아지 [songaji] : calf
송아지 refers to a baby “소 (cow).”
망아지 [mangaji] : foal
“망아지” refers to a baby “말 (horse).”
가람 [garam] : river

가람 is an old native Korean word for “river,” also used in names and literary contexts. One famous Korean river is the Han River, which flows through Seoul.
The Han River basin was an important strategic region during the Three Kingdoms period. It should not be described as the birthplace of Korea’s first kingdom.
Although Koreans use the word “강 [gang]” instead of 가람 these days, 가람 remains a beautiful native Korean word. It is also used as a name for a man or a woman.
바다 [bada] : ocean

바다 is the ordinary native Korean word for “sea” or “ocean.” It remains common in everyday speech.
Korea’s coasts and maritime trade give 바다 an important place in its culture and history.
미르 [mireu] = dragon

미르 is an old native Korean word for “dragon,” now found particularly in names and literary or fantasy contexts. The usual modern word is 용. Korean dragon legends vary, and dragons have often symbolized royal authority; there is no single belief shared by all Asian cultures.
나르샤 [nareusya] = an old honorific form of “fly”

나르샤 is a modern-letter rendering of an old honorific form of 날다 (“to fly”), familiar from the opening of 용비어천가 (Yongbieocheonga). It is not a modern dictionary infinitive or the first Korean word ever written. The work was composed in 1445 and published in 1447. The familiar phrase “육룡이 나르샤” evokes six dragons flying and honors the royal ancestors. For everyday “to fly,” learn 날다 (nalda).
나래 [narae] = wing

나래 is a beautiful native word to indicate a “wing.” It is also a popular female name. Today we use the word “날개 [nalgae]” instead of 나래 more often. However, 나래 is still used in figurative expressions such as “상상의 나래를 펴다,” which means “to spread the wings of one’s imagination,” or to let one’s imagination soar.
누리 [nuri] = world

누리 is a native Korean word to indicate the “world.” It is also a name for a man or a woman. Koreans say “온 누리 [on nuri],” meaning “the entire world.” The everyday word 세계 (segye) is also common for “world”; 누리 often has a literary or evocative feel.
나라 [nara] : nation

나라 means “country” or “nation” and is widely used in everyday Korean. 우리나라 is written as one word and means “our country.” 국 (國) is a Chinese-character element used in compounds; it has not replaced 나라 as the ordinary standalone word. 나라 is also used as a personal name.
Other Korean vocabulary lists you could check out:
10 Romantic Korean Words and Phrases to Express Your Love in Korean
Korean Vocabulary: Jobs and Professions
Korean Emotion Vocabulary: How to Express Your Feelings in Korean
All About Baby! Baby-Related Korean Vocabulary
Conclusion
We’ve learned the ten most beautiful native Korean words. Some belong to everyday speech, while others connect us with older or literary Korean. It is fantastic that through learning a language, you can understand people and the culture of a country as well. So, why don’t you explain the meaning of your native words to Korean friends next time?