This is the 17450th most frequent Polish word.
zastrzyk
Injection.
Used to signify a medical injection administered by a healthcare professional.
Lekarz podał pacjentowi zastrzyk przeciwbólowy.
The doctor gave the patient a painkiller injection.
Used metaphorically to signify a boost or influx of funding into an organization.
Nowa inwestycja będzie zastrzykiem gotówki dla firmy.
The new investment will be a cash injection for the company.
Again used metaphorically, this time to signify an invigoration or revitalization brought by a new initiative.