病毒
bìngdú · HSK 5
virus
🦠 病毒 = sickness (病) + poison (毒)
病 means illness or disease; 毒 means poison or toxin. Together they form the word for virus — literally a disease-poison. Also used metaphorically for computer viruses.
病 — sickness radical 疒 + 丙 (bǐng, phonetic)
病 is a semantic-phonetic compound. The radical 疒 depicts a person lying on a bed and signals illness or ailment. The component 丙 supplies the sound (bǐng → bìng). Originally 病 referred to a serious illness, contrasted with 疾 for a lighter ailment; today it broadly means 'sick' or 'disease.'
毒 — grass 屮 on top + 母 (mother/below)
Originally an associative compound showing a toxic plant (the 屮/生 element on top) over 毋, suggesting something harmful that must be forbidden. The early meaning was 'poisonous herb,' which broadened to 'poison,' 'toxic,' and figuratively 'cruel' or 'malicious.' The modern form keeps this top-plant + bottom-warning structure.