three phases

electric power source, power supply / power outlet, power socket

device, equipment, machinery, machine

needed, necessary

need, necessity

electricity / electric light

mutual, reciprocal, with one another / appearance, look

nature, personality / fate, destiny / a habit, custom, or practice / the good and bad of a person; especially, one's faults

minister of state

appearance, how something looks / an aspect of something / (grammar) grammatical aspect / (physics) a phase, as of matter / (ikebana) the central supporting branch of an ikebana arrangement