How to Say "existence" in Spanish
The Spanish word for “existence” is “existencia” — A2 level. This is a very common word in everyday Spanish.

Examples
La existencia de vida en otros planetas es una pregunta fascinante.
The existence of life on other planets is a fascinating question.
Ella cree en la existencia de los fantasmas.
She believes in the existence of ghosts.
Su existencia fue muy difícil después de la guerra.
His life (or existence) was very difficult after the war.
Always Feminine
Even though 'existencia' ends in '-a,' remember it is always feminine. You must use 'la existencia' or 'una existencia'.
Mixing with 'Ser'
Mistake: “Usar 'su ser' cuando se refiere a la vida de alguien.”
Correction: Use 'su existencia' or 'su vida' when talking about the state or duration of someone's life, not 'su ser' (which means 'his being' or 'his self').
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