redundant wording; pleonasm; repeated word or phrase
Refers to a stylistic flaw where words with similar meanings are used together unnecessarily, or a word/phrase is repeated. Often discussed in writing guides. Compare 重言 (じゅうげん), which is a more technical term for the same concept.
See also: 重言
"Falling off a horse from a horse" is a typical example of redundant wording.
When writing, be careful of pleonasms.