συναλγεῖν
From LSJ
ἀλλ᾽ ἀμφὶ τοῖς σφαλεῖσι μὴ 'ξ ἑκουσίας ὀργὴ πέπειρα → to those who err in judgment, not in will, anger is gentle | men's wrath is softened toward those who have erred unwittingly
Greek > English (Woodhouse Verbs Reversed)
(see also συναλγέω): in sorrow, sympathise with in sorrow, sympathise with