Οὔτοι ποθ' οὑχθρός, οὐδ' ὅταν θάνῃ, φίλος → One's enemy does not become one's friend when they die
P. and V. κακός, πονηρός, κακοῦργος, φαῦλος, αἰσχρός, μοχθηρός; see wicked.
unworthy: P. and V. ἀνάξιος.
ill-tempered: P. and V. δύσκολος, πικρός.
intractable: Ar. and P. χαλεπός.