Q: Does the word "slack" mean the same thing in "Suddenly they were in a slack and the water was motionless." and "A gradual slack in output."?

A: different meanings

Q: Does the word "approach" mean the same thing in "Approach a task." and "To approach the city."?

A: different meanings

Q: Does the word "leave" mean the same thing in "At what time does your train leave?" and "Her blood left a stain on the napkin."?

A: different meanings

Q: Does the word "custody" mean the same thing in "He was mistreated while in police custody." and "The suspect is in custody."?

A:
different meanings