noun
Refers to a coded or insider language used to conceal meaning from outsiders; similar to 隠語.
See also: 隠語
彼らは仲間内だけで通じる隠し言葉を使っていた。
They used a secret language understood only among themselves.
Standard kanji spelling using 言葉.
Alternate kanji spelling using 詞; less common but valid.
隠語 is a more common term for argot or jargon; 隠し言葉 is a less frequent synonym.
Compound of 隠し (kakushi, 'hiding') + 言葉 (kotoba, 'word, language').