Existence
Life, Survival
noun
Suppose that life is in existence on this planet... What would that say about life and survival in such an unforgiving place?
せいぞん
This is a jukugo word, which usually means on'yomi readings from the kanji. If you know the readings of your kanji you'll know how to read this as well.
われわれの肉体は、生存のためにつねに水分を必要としている。
Our bodies always need water for survival.
その世界では、きょ人たちが人るい生存のきょういとなっていた。
In that world, titans were threatening the existence of humanity.
FBIは、生存者を求めて、夜通しTofuguオフィスの中を捜索した。
The FBI searched all night for the survivor in the Tofugu office.