통하다 The best way to learn another language, based on my previous experience, is just to memorize the whole sentence which is being used prequently on actual life. And try to use it as often as you can till you you will understand perfect meaning of each words that consist the sentence. Practice, 통하다 : to pass through, from one end to the other to communicate to use as a medium (often in the form 통하여) (Wiki) Usages in real world 둘은 잘 통했다(통하다) Two of them really clicked.(their mind was connected from one end to the other) 그들은 우체국을 통해서(통하다) 편지를 전달했다. They sent the letter by post office. (Pass through)