injection
🇺🇸
/ɪnˈdʒekʃn/
🇬🇧
/ɪnˈdʒekʃn/
putting medicine or other substances into the body using a needle
The doctor gave him an injection to help with the pain.
a large amount of money given to help something improve
The company needs a cash injection to stay in business.
forcing a liquid or substance into something
The engine uses fuel injection to run more efficiently.