1. carrier
Impure drinking water can be a carrier of diseases.
You can be a hepatitis carrier and spread it to other people without even realising it.
Written words, carrier pigeons, the telegraph, and many other devices carried ideas faster and faster from man to man.
Has the letter carrier been by yet?
Englisch Wort "nośnik ładunku"(carrier) tritt in Sätzen auf:
Unit 17 Intermodal transport