The kanji 疫 primarily means "epidemic," "plague," or "disease." It signifies a widespread and harmful illness affecting a large population. It conveys the concept of a contagious or infectious sickness that causes suffering and disruption.

・On-yomi (音読み): エキ (eki) ・Kun-yomi (訓読み): None, or rarely used in isolation.

⚫︎ 疫病 (ekibyou) Translation: Epidemic; plague; infectious disease. ⚫︎ 検疫 (ken'eki) Translation: Quarantine; inspection for diseases. ⚫︎ 防疫 (boueki) Translation: Disease prevention; prevention of epidemics.

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The kanji 疫 is a 形声文字 (keisei moji), a phono-semantic compound. It is composed of two parts: ⚫︎ The radical 疒 (やまいだれ, yamai-dare) on the left side, which represents "sickness" or "disease." ⚫︎ The phonetic 役 (yaku) on the right side, which provides the sound and hints at the meaning related to service or duty, implying the impact of the disease. Therefore, the kanji 疫 graphically combines the idea of sickness with a sound component, symbolizing an illness that spreads like a duty.