不仲|ふなかfunaka[1]atamadaka (head-high)

1. no-adjective, na-adjectivediscord; (on) bad terms (with)

• Synonym不和ふわNeutralDisharmony between people, as in 「家庭不和」. A written-style word, near-synonymous with 「不仲」.
• Synonym不協和音ふきょうわおんNeutralLiterally a dissonant sound; by extension, discord within a team or group. Centers on clashing opinions rather than the state of a relationship.
• Synonym確執かくしつWrittenA grudge in which neither side yields, as in 「両者の確執」. The focus is on long-standing antagonism; a formal written word.
• Synonym仲違いなかたがいNeutralA falling out: the relationship breaking down, as in 「親友と仲違い」. Focuses on the process of turning from good to bad, while 「不仲」 is the state of being on bad terms.
• Synonym齟齬そごWrittenThings, understandings or opinions failing to line up, as in 「認識に齟齬がある」; usable for interpersonal communication too. A formal written word.
• Related食い違いくいちがいNeutralStatements or opinions not matching; the focus is on contradictory content.
• Related行き違いいきちがいNeutralMissing each other, as of letters or people; also misunderstandings and estrangement. The focus is on communication going wrong.
• Related摩擦まさつNeutralPhysical friction, and by extension friction in trade or between people. The focus is on conflict.
• Related敵対てきたいNeutralHostility: regarding the other as an enemy and opposing them. Far heavier than 「不仲」.
• Related葛藤かっとうNeutralInner conflict or interpersonal entanglement. The focus is on psychological struggle.
• Related波風なみかぜNeutralWind and waves; figuratively, an uproar at home, as in 「波風を立てる」. The focus is on stirring up trouble.
• Related相克そうこくWrittenMutual rivalry and conflict; also the overcoming cycle of the five elements. A written-style word.
• Related軋轢あつれきWrittenFriction and disputes, as in 「軋轢が生じる」. The focus is on opposition and conflict; a formal written word.
• Related背中合わせせなかあわせNeutralStanding back to back; figuratively, being at odds or having danger close by. Its metaphorical uses are varied.
• Related不調和ふちょうわNeutralLack of harmony or mismatch; said of combinations and of relations within a group alike. The focus is on disharmony.
• Related風波ふうはWrittenWind and waves; figuratively, disputes. A written-style word.
• Related紛議ふんぎWrittenDisputes and controversy. Written in style and not often used.
• Related軋みきしみNeutralA creaking sound; by metaphor, strains appearing in a relationship.
• Antonym仲良しなかよしNeutralAntonym: getting along well, being close friends. Stands opposite to 「不仲」.
• Antonym親密しんみつNeutralAntonym: intimacy, a close relationship. Stands opposite to 「不仲」.

When people don't get along, use 「不仲」, as in 「嫁姑の不仲」 or 「不仲説」. For a falling out say 「仲違い」; in written prose, 「不和」; for long-standing grudges, 「確執」; for friction, 「軋轢」. The antonym is 「仲良し」. The other words each target a specific shade: gaps in views or communication (「食い違い」「行き違い」「齟齬」), hostility (「敵対」), inner conflict (「葛藤」), stirred-up trouble (「波風」), and more.

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

1. 仲なかが悪わるいこと。関係かんけいが悪化あっかすること。また、そのようなさま。