Inveterate
/ɪnˈvɛtəreɪt/
Synonyms
- chronic
- habitual
- incorrigible
- deep-seated
- entrenched
Slang Meanings
Old hat
His inveterate habits were old hat; everyone knew how he'd behave.
Stuck in one's ways
He's so inveterate, he's stuck in his ways and won't try anything new.