SuaviloquyToday’s word

mover

Mover, n.

1. A person or thing that moves, stirs, or changes place.

2. A person or thing that imparts motion, or causes change of place; a motor.

3. One who, or that which, excites, instigates, or causes movement, change, etc.; as, movers of sedition. These most poisonous compounds, Which are the movers of a languishing death. Shak.

4. A proposer; one who offers a proposition, or recommends anything for consideration or adoption; as, the mover of a resolution in a legislative body.

Shades of meaning

Fernald has no entry of its own for mover; he lists it under agent.

Where he writes about it:

In strict philosophical usage, the prime mover or doer of an act is the agent. — from agent