전자 상거래가 · 전자 상거래를
e-commerce
Example
요즘은 전자 상거래로 물건을 사는 사람이 많아요.
These days, many people buy things through e-commerce.
Word parts
전 electric+자 particle+상 trade+거 go+래 come
Literally 'electronic trade'; 거래 'deal' is literally 'going and coming.'
Good to know
In business news it's also called 이커머스, from English 'e-commerce.'