also: つけじえ
noun
Archaic noun for a hint or suggestion given to someone. Rare in modern Japanese; encountered mainly in older texts.
昔の小説には「付け知恵をする」という表現が出てくることがある。
In old novels, the expression 付け知恵をする sometimes appears.
Compound of 付け (tsuke, 'attaching') and 知恵 (chie, 'wisdom'), literally 'attached wisdom'. The exact historical derivation is uncertain, but it likely referred to imparting a clever idea or hint to someone.