injection
transitive-verb
To introduce a new or different element into something.
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We need to inject some fun into this project.
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The director decided to inject some humor into the serious scene; this injection gave the play a different tone.
To force a liquid into something, typically with a syringe.
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The nurse will inject the medicine into your arm.
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The veterinarian had to inject the dog with antibiotics, so this injection improved health.