素行|そこうsokou[0]heiban (flat)

1. nounbehaviour; behavior; conduct
   彼かれは素行そこう不良ふりょうで１週間しゅうかんの停学ていがくを受うけた。↗

   He was suspended from school for a week for bad conduct.

• Synonym振る舞いふるまいNeutralHow one acts in the moment; also entertaining or treating guests. 「素行」 refers to one's usual conduct over time, not a single occasion.
• Synonym行いおこないNeutralOne's deeds, what a person does, often judged from a moral angle, as in 「日頃の行い」.
• Synonym行状ぎょうじょうWrittenWritten word for conduct, usually with a negative nuance, as in 「不行状」.
• Synonym身持ちみもちWrittenWritten word for one's conduct, often said of women, as in 「身持ちが悪い」; can also mean being pregnant.
• Synonym品行ひんこうWrittenFormal word for conduct viewed from a moral angle, as in 「品行方正」; stresses whether behaviour is good or bad.
• Related行為こういNeutralA deliberate, concrete act; used mostly in legal and academic contexts, as in 「違法行為」.
• Related態度たいどNeutralAttitude or manner toward people and situations; stresses the feelings or stance a person displays.
• Related行儀ぎょうぎNeutralManners in the etiquette sense; typically said of children or how one sits, as in 「行儀が悪い」.
• Related行動こうどうNeutralGeneral action, the broadest in scope here, with no judgement of good or bad conduct.
• Related言動げんどうNeutralCovers both speech and behaviour, as in 「言動に注意する」; its range includes what one says.
• Related所作しょさNeutralBodily movements and carriage; often used for etiquette or stage performance, with the focus on posture.

Use 「振る舞い」 or 「態度」 for everyday behaviour and manner, and 「行儀」 for etiquette and manners. 「素行」 is for a person's usual conduct, good or bad, and is common in 「素行調査」; 「品行」 is the formal near-equivalent.

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

1. 日頃ひごろの行おこない。