The sky suddenly grew dark.
These materials were made in a hurry, so there may be typos.
steeply; sharply
Used for a slope, descent, curve, bend, or similar physical change becoming steep or sharp.
The slope descends steeply from here, so please watch your step.
The road bends sharply to the right before the bridge.
The baby suddenly started crying.
The road curves sharply ahead, so please be careful.
An accident suddenly happened in front of the station.
My condition suddenly worsened during the trip.
We had to change our plans suddenly because of the boss's instructions.
急に is a neutral, general word for 'suddenly' usable in formal contexts, while ぱっと is colloquial and onomatopoeic, often implying a visual or instantaneous change.
さっと emphasizes the brief, fleeting nature of a sudden event, while 急に is a broader word for any unexpected change.
急に emphasizes the speed of a sudden change, while 不意に emphasizes the element of surprise and lack of preparation.
急に stresses the unexpectedness of a sudden change, while たちまち can describe swiftness that isn't necessarily surprising.
急に is a very common, casual word for something happening quickly or suddenly, whereas 俄かに is rarer and implies an abrupt change with no prior sign.
急に is a general word for any abrupt change, whereas 一躍 is reserved for a dramatic rise in position, fame, or recognition.
急に is the common, casual way to say 'suddenly', whereas 俄然 is rarer and more emphatic, often highlighting a surprising or noticeable change.
急に describes a sudden, abrupt change, the opposite of the slow, steady progression described by ジワジワ.
急に describes something happening suddenly and without warning, the opposite of 着々's slow, steady advancement.
急に describes a sudden, abrupt change, the opposite of 漸次's slow, incremental change.
だんだん describes a slow, gradual change, while 急に describes a sudden, abrupt one.
急に means 'suddenly, abruptly', the direct opposite of 徐に (おもむろに) in its original sense of moving slowly and calmly.
急に describes a sudden, abrupt change, the opposite of じわり's slow, imperceptible progression.
急に describes something happening suddenly and abruptly, the opposite of そろそろ's gradual, quiet manner.