slow to act; reluctant to get started
Describes a person who is hesitant or sluggish in beginning a task, often due to laziness or lack of motivation. The antonym is 腰が軽い (quick to act).
See also: 腰の重い
Antonyms: 腰が軽い
He is slow to get started and doesn't begin his work easily.
For people who are reluctant to act, it's good to have them start with small tasks.