疑い|うたがいutagai[0]heiban (flat)

1. noundoubt; question; uncertainty; skepticism; scepticism; suspicion; distrust
   それで疑うたがいをさしはさむ余地よちはなくなる。↗

   That leaves no room for doubt.

• Synonym疑惑ぎわくNeutralNeutral. Doubt about whether something is true or involves wrongdoing, as in 「汚職の疑惑」; the news word for scandals. 「疑い」 is broader, covering suspected illness and crime.
• Synonym疑念ぎねんWrittenWritten/formal prose. Doubts one holds in the mind, as in 「疑念を抱く」; the stress is on inner doubt. 「疑い」 fits both speech and writing.
• Synonym懐疑かいぎWrittenWritten/formal prose. A skeptical stance of not believing easily; usually appears as 「懐疑的」, as in 「政策に懐疑的だ」. 「疑い」 is more general.
• Synonym疑心ぎしんWrittenWritten/formal prose. A suspicious, distrustful mind, as in 「疑心暗鬼」; the focus is on a wary, doubting temperament. 「疑い」 also covers suspected illness and crime.
• Synonym疑ぎWrittenWritten/formal prose. Mostly appears inside compounds, as in 「質疑」 and 「容疑」; rarely used alone. In everyday speech, say 「疑い」.
• Synonym疑問ぎもんNeutralNeutral. Something one does not understand or doubts, as in 「疑問に思う」; the focus is on wanting to clear it up. 「疑い」 stresses doubt and distrust, and covers suspicion.
• Synonym不審ふしんNeutralNeutral. The sense that something is suspicious or not right, as in 「不審な点」 and 「挙動不審」; also works as an adjectival noun. 「疑い」 is a noun for doubt itself.
• Synonym疑義ぎぎFormalFormal. Doubts over whether content or a course of action is proper, as in 「疑義を呈する」; seen mainly in meetings and legal documents.
• Synonym嫌疑けんぎWrittenWritten/formal prose. Specifically suspicion of having done something wrong, as in 「嫌疑をかけられる」; a legal term. 「疑い」 can serve this role too and is more general.
• Synonym疑りうたぐりCasualColloquial. The noun tied to the verb 「疑る」, mostly seen in 「疑り深い」. Rarely stands alone; say 「疑い」 in most cases.
• Synonym懐疑心かいぎしんWrittenWritten/formal prose. The mindset of not believing things easily, as in 「懐疑心が強い」. 「疑い」 is doubt itself and has wider use.
• Related半信半疑はんしんはんぎNeutralNeutral. A four-character idiom for being half convinced and half in doubt, an undecided state of mind. 「疑い」 is doubt itself and can take a concrete object.
• Antonym信頼しんらいNeutralNeutral antonym. Opposite to 「疑い」 on the axis of trust versus doubt: believing in and relying on someone, as in 「信頼を寄せる」.
• Antonym確信かくしんNeutralNeutral antonym. Firm conviction that leaves no room for doubt, as in 「確信を持つ」; opposes 「疑い」 on whether something is certain.

Default to 「疑い」 for doubt, suspicion, or a possibility, as in 「がんの疑い」; it suits both speech and writing. For scandals, 「疑惑」 is the usual news word; for things you cannot make out, 「疑問」; in legal or formal writing, criminal suspicion is 「嫌疑」. The opposites are 「信頼」 and 「確信」.

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

1. 疑うたがうこと。