dueon Basic wordsalso onCEFR Intermediate (B1)? CEFR Upper intermediate (B2)? CEFR Advanced (C1)? CEFR Mastery level (C2)? Academic Vocabulary List (AVL)? Conclusions (CONCs)? Band 2 (BND2)? undue undue(adjective) indebido,infundado Forms adjective undue