1.
You use ~ to describe people or their behaviour when they cannot stop doing something wrong, harmful, or unnecessary.
...a ~ liar...
He was a ~ gambler and often heavily in debt.
ADJ: ADJ n
~ly
John is ~ly neat and clean, he’s terrified of germs.
ADV: ADV with v, ADV adj
2.
If a book or television programme is ~, it is so interesting that you do not want to stop reading or watching it.
The BBC series Hot Chefs is ~ viewing...
ADJ
~ly
...a series of ~ly readable novels.
ADV: ADV adj