How to Say "self-destructive" in Spanish
The Spanish word for “self-destructive” is “suicida” — B1 level.
English → SpanishB1
adjectiveB1
Figurative meaning, referring to harmful behavior.

Examples
Él estaba teniendo pensamientos suicidas.
He was having suicidal thoughts.
Fue una misión suicida, pero necesaria para ganar la guerra.
It was a suicide mission, but necessary to win the war.
Dejó una nota suicida para su familia.
She left a suicide note for her family.
Adjective Agreement
Like the noun form, the adjective 'suicida' does not change its ending for masculine or feminine nouns. It only changes to plural: 'suicida' (singular) vs. 'suicidas' (plural).
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