전기가 · 전기를
electricity, power
Example
전기를 아끼려고 방의 불을 껐어요.
I turned off the light in my room to save electricity.
Word parts
전 electric+기 energy
Literally 'lightning energy'.
Related words
전기가 · 전기를
biography
Example
어릴 때 위인 전기를 많이 읽었어요.
When I was little, I read a lot of biographies of great people.
Word parts
전 pass on+기 record
Literally 'passed-down record.'
Good to know
전기 also means 'electricity' (電氣) and 'first half' (前期); context tells you which.