1. To join in attaining a common aim

Derived forms: mucked in

• Huntsville
• huon pine
• Hupa
• hurdle
• hurdle race
• hurdler
• hurdles
• hurdling
• hurdy-gurdy
• hurl
• hurler
• Hurler's disease
• Hurler's syndrome
• hurling
• hurly burly
• Hurok
• Huron
• hurrah
• hurray
• hurricane
• hurricane deck
• hurricane lamp
• hurricane lantern
• hurricane roof
• hurried