inveterate

Having a particular habit, activity, or interest that is long-established and unlikely to change.

• inveterately/ɪnˈvɛtərətli/(adv)根深蒂固地
• inveteracy/ɪnˈvɛtərəsi/(n)根深蒂固

• inveterate liar
• inveterate gambler
• inveterate habit
• inveterate optimist

1. 1.He was an inveterate traveler who had visited over 100 countries by age 50. (confirmed, habitual)
2. 2.She was an inveterate liar — no one could trust anything she said. (compulsive, long-standing)

• habitual/həˈbɪtjʊəl/— done regularly
• chronic/ˈkrɒnɪk/— persistent, long-lasting
• incorrigible/ɪnˈkɒrɪdʒɪbəl/— cannot be corrected

from Latin "inveteratus" — in- (into) + vetus (old) — "veterare" = to make old — grown old in a habit