How to say "ill" in Japanese

• 病めるやめる
  expression, prenominal modifierCovers the health sense of 'ill': sick or ailing. Less common, so it is seldom the word you reach for to say someone is ill; it suits descriptions of a person in poor health.
• 悪し様にあしざまに
  expression, adverbNot the sickness sense: this is the 'ill' of 'speak ill of', an adverb meaning unfavourably, disparagingly or insultingly. It is less common, and its place is in disparaging, insulting talk about someone.
  ジョージ３世せいは歴史家れきしかによって不当ふとうに悪し様あしざまに言いわれてきた。↗

  George III has been unfairly maligned by historians.

Choose 「病める」 for the literal sense of being sick or ailing, though it is less common; 「悪し様に」 is unrelated to health and covers only the 'ill' of 'speak ill of', meaning disparagingly or insultingly.

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

• 病めるやめるsick
• 悪し様にあしざまにunfavourably