desidentificar

An academic term from psychology and sociology meaning to stop identifying with a group, label, or category — used in discussions of identity and stereotype threat (desidentificarse de un estereotipo). Not a word you'll hear in daily conversation.

• El estudio explica por qué algunos alumnos se desidentifican con la escuela. — The study explains why some students disidentify with school.
• Se desidentificó del grupo tras el escándalo. — He disassociated himself from the group after the scandal.
• Los investigadores miden cuánto se desidentifican los sujetos con su rol de género tradicional. — The researchers measure how much subjects disidentify with their traditional gender role.

Reaching for this in everyday speech to mean 'disagree with' or 'distance oneself casually' — it's a specific academic term about identity, where ordinary conversation would use no sentirse identificado con instead.