This is the 2701st most frequent Catalan word.
alterar
"Alterar" means "to alter" or "to disturb" in English.
'Alterar' is used here to mean disrupting or upsetting a condition or state.
La seva actitud va alterar l'harmonia del grup.
Their behavior disrupted the group's harmony.
'Alterar' is used here to indicate modifying something, often dishonestly.
L'informe s'ha alterat per mostrar resultats millors.
The report has been tampered with to show better results.
'Alterar' is used here to describe becoming emotionally agitated.