사인

From English sign, perhaps by way of Japanese サイン (sain, “signature”).

• (SK Standard/Seoul) IPA^(key): [s͈a̠in]
• Phonetic hangul: [싸인]

사인 • (sain)

1. signature

   Synonym: 서명(署名) (seomyeong)

   계약서에 사인을 했다.

   gyeyakseo-e sain-eul haetda.

   [I] signed the contract.

2. autograph

   어제 유명 배우의 사인을 받았다.

   eoje yumyeong bae'u-ui sain-eul badatda.

   I got an autograph of a famous actor yesterday.

3. signal

   감독이 선수에게 손으로 사인을 보냈다.

   gamdog-i seonsu-ege son-euro sain-eul bonaetda.

   The coach sent hand signals to the player.

• 사인펜 (sainpen, “marker pen”)
• 사인회 (사인會, sainhoe, “signing event”)
• 사인하다 (sainhada, “to sign”)

From English sine.

• (SK Standard/Seoul) IPA^(key): [s͈a̠in]
• Phonetic hangul: [싸인]

사인 • (sain)

1. (trigonometry, mathematics) sine

• 코사인 (kosain, “cosine”)
• 탄젠트 (tanjenteu, “tangent”)

Sino-Korean word from 死因, from 死 (“death”) + 因 (“cause”).

• (SK Standard/Seoul) IPA^(key): [ˈsʰa̠(ː)in]
• Phonetic hangul: [사(ː)인]
  • Though still prescribed in Standard Korean, most speakers in both Koreas no longer distinguish vowel length.

사인 • (sain) (hanja 死因)

1. cause of death

   사인을 밝히다

   sain-eul balkida

   to determine the cause of death

Sino-Korean word from 私人, from 私 (“private”) + 人 (“person”).

• (SK Standard/Seoul) IPA^(key): [sʰa̠in]
• Phonetic hangul: [사인]

사인 • (sain) (hanja 私人)

1. private individual

   Antonym: 공인(公人) (gong'in)