いや・嫌・厭iya[2]odaka (tail-high)

1. na-adjectivedisliking; not wanting; unwilling (to do); reluctant
   彼かれの話し方はなしかたが嫌いやなの。↗

   I don't like his way of talking.
2. na-adjectiveunpleasant; disagreeable; nasty; horrible; disgusting; undesirable; unwelcome
   この卵たまごは嫌いやな匂においがする。↗

   This egg has a bad smell.
3. interjectionno!; quit it!; stop!

• Synonym嫌がるいやがるNeutralA verb: reluctance displayed in one's attitude or behaviour, as in 「子どもが薬を嫌がる」; 「嫌」 is the adjectival noun for the feeling itself.
• SynonymきらいNeutralDislike or aversion to a person or thing, as in 「野菜が嫌い」; 「嫌」 stresses refusal and unwillingness, with a more direct tone.
• Synonym嫌うきらうNeutralA verb: to dislike and avoid a person or thing, as in 「湿気を嫌う」; mostly used for objective description.
• Synonym厭ういとうWrittenWritten style: to be unwilling or to balk at; often in 「労を厭わない」 (not sparing pains), and it can also mean cherishing one's health.
• RelatedいやらしいCasualColloquial: unpleasant or nasty, and often lewd or salacious, as in 「いやらしい目つき」.
• RelatedうっとうしいCasualColloquial: gloomy and oppressive, or annoying and in the way, as in 「鬱陶しい天気」 or 「前髪が鬱陶しい」.
• Related不愉快ふゆかいWrittenA Sino-Japanese word, on the formal side: feeling upset or displeased, as in 「不愉快な思い」.
• Related不快ふかいWrittenWritten-leaning: displeasure or discomfort, including feeling physically unwell, as in 「不快感」.
• Related憎いにくいNeutralHateful and detestable, a stronger degree than 「嫌」; used ironically it can also mean admirable.
• Related忌まわしいいまわしいWrittenWritten style: abhorrent or ill-omened, as in 「忌まわしい事件」; carries a sense of dark misfortune.
• Related憎らしいにくらしいNeutralHateful or detestable, often with a touch of affectionate irony, as in 「憎らしいほど上手い」.
• Related憎悪ぞうおWrittenWritten style: intense hatred, far heavier than 「嫌」.
• Related嫌悪けんおWrittenWritten style: disgust or aversion, as in 「自己嫌悪」; more formal and profound than 「嫌」.
• Related忌々しいいまいましいCasualColloquial: so infuriating you could curse, as in 「忌々しい雨」; charged with strong resentment.
• Related厭わしいいとわしいWrittenWritten style: so detestable you want to turn away from it; rare in everyday speech.
• Related汚らわしいけがらわしいWrittenWritten style: filthy to the point of disgust; mostly moral revulsion, as in 「汚らわしい金」.
• Related疎ましいうとましいWrittenWritten style: unpleasant, making you want to keep someone at a distance; rare in everyday speech.
• Related憎たらしいにくたらしいCasualA colloquial intensifier of 「憎らしい」: utterly hateful and infuriating.
• Related厭悪えんおWrittenWritten style: loathing and hate; used very rarely — say 「嫌悪」 in everyday speech.
• Antonym愛するあいするNeutralThe opposite of 「嫌」: to love; deep in feeling and solemn in tone.
• Antonym好くすくNeutralThe opposite of 「嫌」: to like; most often seen in the passive, as in 「人に好かれる」.

Unwilling or averse feelings take 「嫌」; disliking something takes 「嫌い」; reluctance showing in one's manner takes 「嫌がる」. For things that are annoying or oppressive, use 「鬱陶しい」; for hatred, 「憎い」; for formal written disgust, 「嫌悪」. The rest are narrower or rarer shades — pick them only for the specific nuances described above.

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

1. （いや）あることを拒否きょひしたいという心情しんじょう。