How to say "desperately" in Japanese

• 必死になってひっしになってCommon
  expressionCovers 'desperately' in the sense of frantic urgency — trying with one's very life, as when struggling to survive or scrambling to meet a deadline. Use it when the situation feels dire.
• 一生懸命いっしょうけんめいJLPT N4approx.Common
  adverb, na-adjective, nounAs a yojijukugo meaning with all one's might, it fits 'desperately' only when the word really means doing something very hard. For earnest, utmost effort it is the natural choice rather than true desperation.
  もっと一生懸命いっしょうけんめい勉強べんきょうすべきだったのに。↗

  You should have worked harder.

Use 「必死になって」 for frantic, urgent desperation, often fearing failure or danger, and 一生懸命 for earnest, wholehearted effort; when 'desperately' just means working very hard, 一生懸命 is usually the better choice.

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

• 必死になってひっしになってdesperately
• 一生懸命いっしょうけんめいvery hard
• しゃにむにdesperately
• やけにawfully
• ここを先途とここをせんどとfervently
• 一所懸命いっしょけんめいvery hard
• 死ぬ気でしぬきでall out