unknown word; unknown language
Refers to a word or language that is not known or recognized, often used in linguistics, language learning, or NLP contexts.
When the text contains unknown words, reading comprehension becomes difficult.
未知語の意味を文脈から推測する練習をした。
We practiced guessing the meaning of unknown words from context.
Compound of 未知 (michi, 'unknown') and 語 (go, 'word' or 'language').