The present participle of inject; introducing a substance into something else, typically with a syringe into the body, or adding something into a situation or conversation.
From Latin 'inicere' meaning 'to throw in', composed of 'in-' (into) + 'iacere' (to throw). The medical sense developed in the 17th century with advances in surgical techniques, while figurative uses (injecting humor, capital) emerged in the 19th century.
The first recorded medical injection was performed in 1656 using a goose quill and pig's bladder, but the technique didn't become common until the invention of the hypodermic syringe in the 1850s. The word's metaphorical uses are incredibly versatile - we inject code, money, energy, and even personality into various situations.
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