Today was an embarrassing day. While I was teaching my younger students at Kid Castle, all of a sudden, they burst out laughing due to my continual misspellings in Chinese characters. Some students were so sweet and thoughtful that they tried to comfort me by telling me that the reason I misspelled those characters was due to my long stay in America so my Chinese ability got rusty. Therefore, I've decided to start keeping a diary in Chinese more often in order to improve my poor Chinese.
Generally, the difference is size: you can step over a brook, jump over a creek, wade across a stream, and swim across a river. But the distinction between them (especially creek and stream) is somewhat hazy, and depends on who named them and when they were named. A run (such as Bull Run in Virginia) is a "small stream". Streams and rivers named kill (from the Middle Dutch word kille) occur frequently in New York (and occasionally in nearby states), and were most likely named by the Dutch. Some of these have had "creek" or "river" added to them later (Catskill Creek, Fishkill River).