不純物|ふじゅんぶつfujunbutsu[2]nakadaka (mid-high)

1. nounforeign matter; impurities

• Synonym夾雑物きょうざつぶつWrittenA foreign substance mixed into the main body; written, technical language. 「不純物」 is the more common choice.
• Synonymまじり物NeutralThings mixed in, miscellaneous matter; a descriptive, colloquial expression, close in meaning to 「不純物」.
• RelatedかすNeutralDregs left after pressing or refining, e.g. sake lees; also figuratively for worthless people, as in 「人間の滓」. 「不純物」 is impurity mixed into the main substance.

Use 「不純物」 for matter mixed in with something beyond its main components; it leans chemical and technical, as in 「不純物を取り除く」. In formal prose use 「夾雑物」, and for dregs or lees use 「滓」.

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

1. その物質ぶっしつを構成こうせいする主おもな成分せいぶん以外いがいに雑多ざったに混まじっている物質ぶっしつ。