suddenon Basic wordsalso onCEFR Intermediate (B1)? CEFR Upper intermediate (B2)? Band 2 (BND2)? Band 3 (BND3)? 未预见到的,突然的 suddenness suddenness(noun) 意外,突然 sudden sudden(adjective) 未预见到的,突然的 suddenly suddenly(adverb) 忽然,突然地 Forms nounadjectiveadverb suddenness sudden suddenly