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Example:Despite the weather, the party was dull and people left early.

Definition:not bright or excited; gradually losing energy; lacking in interest or vitality

Example:He appeared very lazy and uninterested in joining the new project.

Definition:not active or energetic; unwilling to work or exert oneself; lacking energy

Example:After a long weekend, she felt lethargic and needed to get moving.

Definition:sleepy, sluggish, or lacking energy; apathetic