decayon Upper intermediatealso onBasic words (BNC)? CEFR Mastery level (C2)? Academic Vocabulary List (AVL)? Band 3 (BND3)? decaimiento,descomposición,deterioro, decaer,descomponerse,deteriorarse decay decay(noun) decaimiento,descomposición,deterioro decay decay(verb) decaer,descomponerse,deteriorarse Forms nounverb decay decay