noun
cheating heart; fickle heart; fleeting heart
Archaic noun for a heart prone to infidelity or inconstancy in love. Cross-referenced with 浮気心 and あだしごころ, which are more common modern equivalents.
In classical literature, the word 徒心 was used to describe a cheating heart.
「あだごころ」は現代ではほとんど使われず、代わりに「浮気心」が使われる。
あだごころ is hardly used today; instead, 浮気心 is used.
The exact derivation is uncertain; the kanji 徒 (vain, futile) and 他 (other) suggest a heart that strays or is inconstant. The word is archaic and its formation likely follows classical patterns.