What is a four-word word?

There are tens of thousands of four words.

The national effective invention patent "multi-Chinese character and graphic symbol input method and its keyboard" (multi-code) contains 90,000 words, including tens of thousands of words. Every time you type a word, you will see a lot of words starting with this word, from which you can choose to type the required four-word word. For example, if you enter n and type four words, you will see the following four-word idioms and four-word vocabulary:

Extend in all directions; Split; In all directions; Be attacked on all sides; Embattled; Rounding; Four bodies are not diligent; The four seas are home; Slow and steady; Four Books and Five Classics; All four are empty; Four-dimensional space; Sishencong point; Sifangtai District; Siku quanshu; Evergreen seasons; The great cause of the four modernizations; Four modernizations; Four operations; Four-guard system; Walk around; Running around; Running around; Four generations under one roof; Four donkey kong; Four wheel drive; Carbon tetrachloride; Tetrafluoroethylene; Siziwangqi; Sijunzi pill; ……。