悔やむ・悔む|くやむkuyamu[2]nakadaka (mid-high)

1. godan verb, transitive verbto mourn; to lament
   あの方ほうがあんなに若わかくして亡なくなったことは悔くやまれます。↗

   It is regrettable that she should have died so young.
2. godan verb, transitive verbto be sorry; to regret; to repent
   よーし！覚おぼえてろ。後あとで悔くやむなよ。↗

   All right! You will be sorry for this.

• Synonym悲嘆ひたんWrittenA noun for grief or sorrow itself, as in 「悲嘆に暮れる」; written style. Unlike 「悔やむ」, it carries no sense of regretting one's own mistakes.
• Synonym弔うとむらうWrittenTo hold a funeral or memorial service or offer condolences, as in 「死者を弔う」; a formal word focused on rites and actions, while 「悔やむ」 is about feelings.
• Synonym悼むいたむWrittenA written word used specifically to mourn someone's death, as in 「故人の死を悼む」; 「悔やむ」 also often means regretting one's own actions.
• Synonym嘆くなげくNeutralTo lament or sigh, voicing sorrow or discontent aloud, as in 「不運を嘆く」; its object is not limited to one's own faults or the dead.
• Related惜しむおしむNeutralTo regret losing something or be reluctant to part with it, as in 「別れを惜しむ」「努力を惜しまない」; it does not mean remorse over one's own faults.
• Related後悔こうかいNeutralA noun taking 「する」 and the everyday go-to for expressing regret; 「悔やむ」 carries a stronger sense of brooding and can also mean mourning.
• Related悔いるくいるWrittenTends toward written prose; to regret after realizing one did wrong, as in 「罪を悔いる」; unlike 「悔やむ」, it is not used for mourning the dead.
• Related思い残すおもいのこすNeutralTo leave things undone with lingering regret, usually in the negative 「思い残すことはない」; 「悔やむ」 is regret over things that have happened.
• Related嘆じるたんじるWrittenA written word that can mean grieving or lamenting, but also admiring; rare today. For everyday laments use 「嘆く」.
• Related嘆ずるたんずるWrittenAn alternative form of 「嘆じる」 covering grief, indignation, or admiration; heavily formal, replaced by 「嘆く」 in daily use.
• RelatedうらむWrittenWhen written 「憾む」, it means to feel regret — formal prose, often in 「憾むらくは」; it has no mourning sense, and as 「恨む」 it means resentment.
• Related悔恨かいこんWrittenA written noun for deep self-reproach over a fault, as in 「悔恨の念」; for the verb, use 「悔やむ」 or 「悔いる」.
• Related悔しがるくやしがるNeutralTo show vexation or frustration over a failure, mistake, or unfulfilled wish; 「悔やむ」 is inward, repeated regret.
• Related惜しがるおしがるNeutralTo appear to find something a pity or regrettable, mostly describing others; carries none of 「悔やむ」's self-reproach or mourning.
• Related無念がるむねんがるNeutralTo show chagrin or a sense of regret over something; used rarely. 「悔やむ」 is inward regret and can also mean mourning.
• Related残念に思うざんねんにおもうNeutralA phrase for feeling regret, mild and even in tone, not limited to one's own faults; lighter than 「悔やむ」.
• Related残念がるざんねんがるNeutralTo appear regretful, mostly used of others; 「悔やむ」 is the person's own inward regret or mourning.
• Antonym誇るほこるNeutralTo take pride in one's strengths or achievements — the opposite of 「悔やむ」, which is regret over what one has done.

Use 「悔やむ」 for regretting one's own mistakes or for mourning the dead, as in 「失敗を悔やむ」. In everyday speech, say 「後悔する」 for regret, 「悼む」 for mourning the dead, and 「悔しがる」 for showing frustration. The written nouns 「悲嘆」 and 「悔恨」 name the feeling itself; 「弔う」 centers on funeral rites; 「嘆く」 voices sorrow aloud; and the 「〜がる」 forms describe visible regret in others.

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

1. 人ひとの死しを悲かなしみ、嘆き悲なげきかなしむ。
2. 自分じぶんのしたことを悪わるかったと残念ざんねんに思おもう。