More N1 vocabulary

• 単調たんちょうmonotony; monotone; dullness
• 俄かにわかsudden; abrupt; unexpected; improvised; offhand
• コンテストcontest
• 赤字あかじdeficit; go in the red
• 迅速じんそくquick; fast; rapid; swift; prompt
• 仕舞うしまうto finish; to close; to do something completely; to put away; to put an end to