How to Say "first appearance" in Spanish
The Spanish word for “first appearance” is “debut” — B1 level. This is a very common word in everyday Spanish.
English → SpanishB1
nounB1
general context

Examples
El debut del cantante fue un éxito total.
The singer's debut was a total success.
Todos esperan con nervios el debut del nuevo jugador.
Everyone is nervously waiting for the new player's first game.
Ella hizo su debut en el cine a los diez años.
She made her film debut at ten years old.
Masculine Word
This is a 'masculine' word, so you should always use it with 'el' (el debut) or 'un' (un debut).
Plural Form
To talk about more than one, simply add an 's' at the end: 'los debuts'.
Spelling with Accents
Mistake: “El debút fue ayer.”
Correction: El debut fue ayer. (Spanish does not put a written accent mark on this word.)
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