Question

practice it
addictive drug that has pain - relieving and sleep - inducing properties
narcotic
liquor
cocaine
heroin
hashish

Explanation:

Narcotics are drugs that can relieve pain and induce sleep and are often addictive. Liquor is an alcoholic beverage and not typically categorized as a drug with those specific medical - like properties in this context. Cocaine is a stimulant. Heroin is a specific type of narcotic but the general term "narcotic" encompasses the described properties. Hashish is a form of cannabis and has different primary effects compared to the described pain - relieving and sleep - inducing properties.

Answer:

narcotic