What does 失踪 mean?
失踪 is a Japanese noun meaning “disappearance; running away; going missing; absconding” in English. It is written as 失踪 in kanji, しっそう in hiragana, and shissou in romaji. This word is part of JLPT N2 vocabulary.
Example sentence
３日後になってはじめて彼女が失踪したことを知った。
It was not until three days after that I knew she had disappeared.