toughon Basic wordsalso onCEFR Upper intermediate (B2)? CEFR Mastery level (C2)? Band 3 (BND3)? 不屈不挠的,坚强的,坚韧的 tougher tougher(adjective) 较坚强的,较艰苦的(tough的比较级) toughest toughest(adjective) 最坚强的,最坚韧的,最粗暴的,最苛刻的(tough的最高级) toughness toughness(noun) 强健,有粘性,韧性 tough tough(adjective) 不屈不挠的,坚强的,坚韧的 Forms adjectivenoun tougher toughness toughest tough