bug
UK: bʌɡ | US: bʌɡ
n. a small insect or similar creeping or crawling invertebrate
n. an error or flaw in a system, especially in computer software or hardware
vt. to annoy or bother someone persistently
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The word "bug" likely originated from Middle English bugge, meaning "scarecrow" or "hobgoblin," possibly derived from Welsh bwg (ghost) or Old English būgan (to bend, implying something frightening). Its modern sense as "insect" emerged in the 17th century. The computing term "bug" (error) was popularized in the 1940s after engineers found an actual moth causing a malfunction in Harvard's Mark II computer—though the term had been used earlier in engineering contexts.
A tiny bug crawled across the windowsill.
The software update fixed several critical bugs.
Stop bugging me with trivial questions!
She screamed when a bug landed on her arm.
The team worked overnight to debug the program.