永遠（えいえん、eiえn）
- eternity

The Japanese word 永遠 (えいえん) means "eternity," "permanence," "forever," or "everlasting." It describes something that lasts for an infinitely long time, without end. It can also imply a sense of timelessness or something that transcends the boundaries of time. The concept often carries a sense of profoundness, grandness, and sometimes, a romantic or idealized notion of enduring quality. The concept focuses on the long-lasting nature, stretching endlessly into the future or representing something that remains constant through time.

⚫︎ 永遠の愛 Translation: Eternal love ⚫︎ 永遠の別れ Translation: Farewell forever (a permanent parting) ⚫︎ 永遠に続く Translation: Continues forever (or, to last eternally)

永遠 is used to describe things that are considered to last forever, such as love, memories, or the universe. It is often used in romantic contexts to express the strength and enduring nature of feelings. It can also be used in more general ways to describe something that seems to have no end, or is believed to exist constantly. It is a slightly formal word and is therefore suitable in many contexts, but use it with discretion as the meaning is quite strong.

永遠 is typically written with the kanji 永遠. The reading in hiragana is えいえん. There are no common variations in the okurigana (the suffix hiragana).

⚫︎ 永久（えいきゅう）: permanence, perpetuity. ⚫︎ 不滅（ふめつ）: immortality, indestructibility. ⚫︎ いつまでも: forever, always. (more casual)

⚫︎ 一時（いちじ）: temporary, for a time. ⚫︎ 瞬間（しゅんかん）: moment, instant. ⚫︎ 有限（ゆうげん）: finite, limited.

二人の永遠の愛を誓いました。 ・Translation: We vowed our eternal love to each other. ・Explanation: This sentence uses 永遠 to describe the enduring nature of the love between two people.

この美しい景色は永遠に心に残るでしょう。 ・Translation: This beautiful scenery will remain in my heart forever. ・Explanation: This sentence uses 永遠 to describe that the memory of the beautiful scenery will remain in the speaker's heart permanently.

The kanji 永 means "long" or "eternal," and 遠 means "far" or "distant." Combining them, 永遠 (永遠) literally expresses the idea of "long and distant" in the sense of stretching infinitely. This combination conveys the enduring aspect of time.