やばいyabai

1. i-adjectivedangerous; risky
   ぼくはやばい橋はしは渡わたりたくない。↗

   I don't want to do anything risky.
2. i-adjectiveawful; terrible; crap
   そういえば。やばい、秀樹ひできに毒どくされてるわ。↗

   Now that you mention it. Yeek, Hideki's habits are rubbing off on me!
3. i-adjectiveterrific; amazing; cool
4. i-adjectivecrazy; insane; not normal; unhinged; extreme

• Synonym危ないあぶないNeutralThe most general word for danger or a bad situation, fine in any setting. 「やばい」 is slang and can also flip to mean amazing or awesome.
• Synonym危険きけんNeutralA noun and adjectival noun for danger, common in speech and writing and typical of warnings, as in 「危険物」. 「やばい」 is slang with a wider meaning.
• Synonym危ういあやういWrittenA written-style word for a precarious, hanging-in-the-balance state, as in 「命が危うい」. 「やばい」 is casual slang and cannot be used this solemnly.
• Synonym物騒ぶっそうNeutralSuggests unsafe conditions where trouble may strike, and also alarming words or objects, as in 「物騒な世の中」「物騒なことを言う」. 「やばい」 is more colloquial and can also mean amazing.
• Related深刻しんこくNeutralDescribes a situation that has turned serious or a grave problem, as in 「深刻な問題」; frequent in the news. 「やばい」 is casual, offhand slang.
• Related重大じゅうだいNeutralSays something is important or grave, as in 「重大な事故」; common in news reports. 「やばい」 is casual slang with a light, offhand tone.
• Related剣呑けんのんWrittenAn old-fashioned written word for something dangerous or unreliable that makes you uneasy. In everyday speech say 「やばい」 or 「危ない」.
• Related絶望的ぜつぼうてきNeutralSo bad there is no hope left, with no chance of recovery. The trouble 「やばい」 flags can be light or heavy, and it can also mean amazing.
• Antonym安全あんぜんNeutralThe opposite of 「やばい」 in its danger sense: free of risk, nothing to worry about, as in 「安全な場所」.
• Antonym大丈夫だいじょうぶNeutralThe opposite of 「やばい」 in its danger sense: all right, no problem. Extremely common in everyday conversation.

In casual speech 「やばい」 covers both bad (dangerous, awful) and good (amazing, cool) senses. For danger in neutral or formal contexts use 「危ない」 or 「危険」; for a serious situation 「深刻」; for unsafe conditions 「物騒」. 「危うい」 and 「剣呑」 are written-style, 「絶望的」 and 「重大」 suit grave matters, and the antonyms 「安全」 and 「大丈夫」 express being safe or fine.

Usage comparisons are AI-assisted and cross-checked by multiple models; for study reference only

1. あやうい。あぶない。不都合ふつごうだ。問題もんだいが多おおい。困惑こんわくさせられる。
2. すばらしい。すごくいい。
3. 看守かんしゅ。
4. 巡視じゅんし。
5. 大阪おおさかの方面ほうめん。