condone (verb) – excuse = to let something pass that you don’t approve of
condonable (adjective) – excusable
He forgot to buy her flowers, but she condoned it.
He condoned her occasional outbursts of bad temper.
Pro-life activists can’t condone abortion.
Racism in any form can’t be condoned.
Discrimination isn’t condonable either.
Her parents didn’t think it condonable that she got such a bad report card, because she was such a bright student.