What does 永久 mean?
永久 is a Japanese noun meaning “eternity, perpetuity, immortality” in English. It can also be translated as “Eikyū era (1113.7.13-1118.4.3)” depending on context. It is written as 永久 in kanji, えいきゅう in hiragana, and eikyuu in romaji. This word is part of JLPT N3 vocabulary.
Example sentence
彼は永久に日本を離れた。
He left Japan for good.