supplement

SUPPLEMENT noun

[ C ] uk/ˈsʌplɪmənt/ us
an extra amount or part added to something

дополнение, приложение
to take a vitamin supplement a newspaper with a colour supplement supplement verb [ T ] uk/ˈsʌplɪment/ us

дополнять, сопровождать(ся)
She works part-time to supplement her pension.