ambustio
From LSJ
πείθεται πᾶς ἥδιον ἢ βιάζεται (Dio Cassius, Historiae Romanae 8.36.3) → it's always more pleasant to be persuaded than to be forced
ambustĭo: ōnis, f. amburo = ambustum,
I a burn: eruptionibus, ambustionibus (medetur myrteum oleum), Plin. 23, 4, 44, § 87.