疑|ぎgi

1. noundoubt; distrust; suspicion (of)

• Synonym疑いうたがいNeutralNeutral; the most common everyday word for doubt; also covers suspicion of wrongdoing, as in 「〜の疑いがある」. More broadly usable than 「疑」.
• Synonym疑惑ぎわくWrittenWritten/formal prose; doubt or misgivings, often about suspected wrongdoing, as in 「疑惑が浮上する」.
• Synonym疑念ぎねんWrittenWritten/formal prose; a doubt that forms in the mind, as in 「疑念を抱く」. Centers on the thought of doubting.
• Synonym懐疑かいぎWrittenWritten/formal prose; a questioning, skeptical attitude toward whether something is true or false.
• Synonym疑心ぎしんWrittenWritten/formal prose; suspicion and mistrust, often in the set phrase 「疑心暗鬼」. Leans toward suspecting others.
• Synonym疑問ぎもんNeutralNeutral and common in daily use; a question about something you don't understand — not necessarily distrust.
• Synonym疑義ぎぎFormalFormal; doubt about the meaning or interpretation of something, as in 「疑義を呈する」.
• Synonym疑りうたぐりCasualColloquial; a casual variant of 「疑い」, used mostly in 「疑り深い」.
• Synonym懐疑心かいぎしんWrittenWritten/formal prose; a skeptical cast of mind — the tendency not to take things at face value.
• Related半信半疑はんしんはんぎNeutralNeutral; the wavering state of half believing and half doubting, rather than doubt itself.
• Antonym信しんWrittenWritten/formal prose; trust — believing in the other party, the direct opposite of doubting 「疑」.
• Antonym疑わないNeutralNeutral; not suspecting something — the opposite of entertaining doubt, though not necessarily full trust.

The single character 「疑」 is mostly for compounds or written prose, as in 「疑を抱く」. In daily speech use 「疑い」; in written prose, 「疑惑」; for a question about something unclear, 「疑問」. Others: 「疑念」 a doubt in one's mind, 「懐疑」/「懐疑心」 a skeptical stance, 「疑心」 suspicion (「疑心暗鬼」), 「疑義」 formal doubts over meaning, 「半信半疑」 half-convinced, 「疑り」 colloquial. Antonyms: 「信」 trust; 「疑わない」 not suspecting.

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

1. （接続せつぞく助詞じょし）終止形しゅうしけいについて仮定かていを表あらわす。たら。と。