When learning a language you have to build up vocabulary, and remember it. As infants we all learn to speak in a very natural way - every word is new, but we concentrate on the words that we need or that we hear regularly, further vocabulary is acquired through school, reading and listening. I can’t remember doing any of it, it just happened. How different it is when you are an adult learning a new and unfamiliar language.
For myself, learning Mandarin, I find it helps to have mental hooks to hang words on, and to use the words as soon and as often as possible so that they become embedded. I am always grateful when a word or group of words makes it easy for me to remember it/them.
The chinese word for electric is just such a useful word. The character for electric/electricity is dian 电 and it usually precedes other characters to make different words, and that makes them easy to remember.
Dian nao 电脑 is ‘electric brain‘ which is a computer - think about how logical that is! A computer IS an electric brain.
Dian ti 电梯 is ‘electric ladder‘, ie: an elevator or escalator – very obvious.
Dianzi is an electron, and from that you get dianzi youjian, ie: email, and dianzi tushu, ie: e-book
Electricity has sparked up my chinese vocabulary no end!