not noble; base; low; dishonorable; despicable
It's tragic that such a good, honest, and kindhearted woman should have made the mistake of marrying such an ignoble man, who only cares about himself and feels no guilt at all for all the harm he has done her.
in (not, opposite of)#nobilis (well-known, famous, renowned, of superior birth) (Latin)
ignoble, odious, reprehensible, sordid, unconscionable
igno (ignore)+ble (able). so if something IS unworthy and not noble, ONE should be able to ignore them.