Common Mistakes / Nuances: ❌ : 「はげしい」 means 'intense,' 'violent,' or 'severe.' It describes the intensity or force of an action or phenomenon. For example, you can have 「はげしい雨」(heavy rain) or a 「はげしい衝突」(violent collision). However, it describes the *force* of the accident, not the emotional impact of *fear* or *dread* it caused. To describe the overall nature of the accident as a 'dreadful thing,' 「おそろしい」 is more appropriate. ❌ : 「きびしい」 means 'strict,' 'stern,' or 'severe/harsh' in the sense of conditions. It is used for things like a 'strict teacher' (きびしい先生), 'harsh criticism' (きびしい批判), or a 'severe winter' (きびしい冬). It relates to difficulty, strictness, or unforgiving circumstances, not the feeling of terror that 「おそろしい」 conveys. ❌ : 「くるしい」 means 'painful,' 'distressing,' or 'difficult.' It describes a state of physical or mental suffering. For example, 'I can't breathe' (息がくるしい) or 'a difficult financial situation' (生活がくるしい). While the people involved in the accident would certainly feel 「くるしい」, this word describes their personal suffering. The sentence, however, is describing the objective nature of the accident itself as a 'dreadful event,' for which 「おそろしい」 is the correct choice.

Common Mistakes / Nuances: ❌ : 「はげしい」 means 'intense,' 'violent,' or 'severe.' It describes the intensity or force of an action or phenomenon. For example, you can have 「はげしい雨」(heavy rain) or a 「はげしい衝突」(violent collision). However, it describes the *force* of the accident, not the emotional impact of *fear* or *dread* it caused. To describe the overall nature of the accident as a 'dreadful thing,' 「おそろしい」 is more appropriate. ❌ : 「きびしい」 means 'strict,' 'stern,' or 'severe/harsh' in the sense of conditions. It is used for things like a 'strict teacher' (きびしい先生), 'harsh criticism' (きびしい批判), or a 'severe winter' (きびしい冬). It relates to difficulty, strictness, or unforgiving circumstances, not the feeling of terror that 「おそろしい」 conveys. ❌ : 「くるしい」 means 'painful,' 'distressing,' or 'difficult.' It describes a state of physical or mental suffering. For example, 'I can't breathe' (息がくるしい) or 'a difficult financial situation' (生活がくるしい). While the people involved in the accident would certainly feel 「くるしい」, this word describes their personal suffering. The sentence, however, is describing the objective nature of the accident itself as a 'dreadful event,' for which 「おそろしい」 is the correct choice.