4 Pics 1 Word Level 984

Answer:
Pump
Hint
What is the answer to the 4 Pics 1 Word level with A woman breathing into something, A bunch of machines, A green water well, and A woman working out her arms?

Hint
What is the answer to the 4 Pics 1 Word level with A woman breathing into something, A bunch of machines, A green water well, and A woman working out her arms?