means A device that blends ingredients together, especially in cooking or baking, by stirring or beating them at speed.

from From the verb 'mix,' which traces back through Middle English to Latin 'miscere,' 'to mix or blend.' The '-er' suffix simply marks the thing that does the mixing — making a mixer, quite literally, 'that which mixes.' The same Latin root quietly seasons words like 'mixture,' 'miscellaneous,' and even 'meddle.'