A more thorough explanation:

Definition: A drunkard is a person who drinks alcohol frequently and excessively, often becoming intoxicated. This term can also refer to someone who is addicted to drugs.

Examples:

• John is a drunkard who spends most of his time at the bar.
• After losing his job, Tom became a habitual drunkard and started neglecting his family.
• Susan's drug addiction has turned her into a drunkard, causing her to lose her job and friends.

The examples illustrate how a drunkard is someone who drinks or uses drugs excessively, leading to negative consequences such as neglecting responsibilities, losing jobs, and damaging relationships.