煩い・患い|わずらいwazurai[0]heiban (flat)

1. nounworry; trouble; anxietyesp. 煩い
2. nounillness; sicknessesp. 患い
   長ながいわずらいで彼かれは借金しゃっきんをこさえた。↗

   His long sickness ran him into debt.

• Synonym懸念けねんWrittenWorry over problems that may arise; written/formal, common in news reports and official documents. 「煩い」 is old-fashioned and also refers to illness.
• Synonym心配しんぱいNeutralThe most all-purpose word for worry, and it can also mean looking after someone. 「煩い」 is more literary, mostly in set phrases and for ailments.
• Synonym憂慮ゆうりょWrittenWritten/formal prose for grave concern over a situation, as in 「事態を憂慮する」. 「煩い」 leans toward personal troubles.
• Synonym不安ふあんNeutralUnease — feeling unsettled or insecure. 「煩い」 points to concrete worries or illness.
• Synonym憂いうれいWrittenWritten/formal prose for worry or melancholy; often in 「後顧の憂い」. 「煩い」 centers on troubling matters and sickness.
• Synonym危惧きぐWrittenFear that a situation will worsen or danger is present, as in 「絶滅危惧種」; mostly written prose and news reports. 「煩い」 is worries in general, plus illness.
• Synonym気遣いきづかいNeutralBeing considerate of others and looking out for them; also misgivings. 「煩い」 is the trouble within your own heart.
• Synonym心労しんろうWrittenA written/formal word for worry that wears you down; mental fatigue. 「煩い」 stresses the troubling matter itself.
• Synonym悩みなやみNeutralThe everyday word for a worry or problem, as in 「悩みを相談する」. 「煩い」 is older, now mostly in phrases like 「恋煩い」.
• Synonym苦しみくるしみNeutralSuffering of body or mind in general — broad and common in daily use. 「煩い」 stresses worries and illness, now mostly in set phrases.
• Synonym面倒めんどうNeutralBother — something that takes time and effort; also looking after someone. 「煩い」 is inner vexation or illness.
• Synonym憂苦ゆうくWrittenWritten/formal prose for sorrow and distress; rare. 「煩い」 also covers illness.
• Synonym心痛しんつうWrittenHeartache from worry; used in the formal expression of sympathy 「ご心痛」. 「煩い」 has no such use.
• Related苦悩くのうWrittenDeep mental anguish and torment, strongly literary, never illness. 「煩い」 covers both worries and sickness, mostly in set phrases like 「恋煩い」.
• Related気がかりきがかりNeutralSomething you cannot stop worrying about. 「煩い」 leans toward vexation and illness.
• RelatedおそれNeutralFear, or the chance that something bad happens, as in 「雨の恐れ」. 「煩い」 never expresses likelihood.
• Related厄介やっかいNeutralA nuisance, something hard to deal with; also being in someone's care. 「煩い」 is inner vexation.
• Related困難こんなんNeutralDifficulty — a hard task or a hard situation. 「煩い」 is mental vexation and says nothing about how hard something is.
• Related難しいむずかしいNeutralAn adjective: difficult, complicated, also fussy. 「煩い」 is a noun for a worry or an illness.
• Related物思いものおもいNeutralDeep, brooding thought, as in 「物思いにふける」. 「煩い」 is what troubles you.
• Related憂えうれえWrittenWritten/formal prose, related to 「憂い」: anxiety, lamentation, also voicing grievances. 「煩い」 leans toward troubles and illness.
• Related煩慮はんりょWrittenWritten/formal prose for worrying over many things; very rare. 「煩い」 is comparatively common.
• Related憂患ゆうかんWrittenWritten/formal prose for hardship and anxiety; rare. 「煩い」 is a bit more down-to-earth.
• Related憂心ゆうしんWrittenWritten/formal prose for a grieving heart; rare. 「煩い」 is the thing that troubles you.

For everyday worry use 「心配」, and for personal troubles use 「悩み」. 「煩い」 is old-fashioned and survives mainly in fixed expressions such as 「恋煩い」 and 「長の患い」, where it can also mean illness itself. Among the alternatives, 「懸念」「憂慮」「危惧」 are formal written words for concern over how things may turn out, 「不安」 is a feeling of unease, 「恐れ」 adds the chance that something bad will happen, 「苦悩」 is deep mental anguish, and 「面倒」 and 「厄介」 are about things being a bother, not inner worries.

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

1. 心配しんぱい。苦労くろう。悩なやみ。
2. 病気びょうき。
3. 病やまい。病気びょうき。