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Verb: muck in
  1. To join in attaining a common aim

Derived forms: mucked in

Nearest

mucid
muciferous
mucilage
mucilaginous
mucin
mucinoid
mucinous
muck
muck about
muck around
muck in
muck up
mucker
muckheap
muckhill
muckle
muckrake
muckraker
muckraking
mucky
mucocele