What does 救援 mean?
救援 is a Japanese noun meaning “relief, rescue, reinforcement” in English. It is written as 救援 in kanji, きゅうえん in hiragana, and kyuuen in romaji. This word is part of JLPT N1 vocabulary.
Example sentence
彼らは直ちに我々の救援にやってきた。
They came presently to our rescue.