Inveterate

adjective/in-VET-er-ut/

Meaning

Having a habit that is so long-established it will not change.

In context
As an inveterate reader, she brings a book even to the beach.

Remember it

Inveterate hides 'veter' (old, as in veteran): a habit grown old and fixed.

Use it well

Use 'inveterate' for a deeply fixed habit, often before words like 'liar' or 'reader'.