緩める

What does 緩める mean in English?

1. to loosen; to slacken(v1, vt)
2. to relax (attention, efforts, etc.); to let down (one's guard); to relieve (tension)(v1, vt)
3. to relax (a rule); to ease (e.g. restrictions); to loosen (control)(v1, vt)
4. to reduce (speed); to slow down; to ease up(v1, vt)
5. to make more gradual (of a slope)(v1, vt)