-Micro-

microscope, micrometer, microchip, microcomputer, microwave, microphone

small

to see something small

-migr-

migrate, immigrate, migratory, immigration, immigrate

change, move

When animals move to a new place

-mim-

mimic, mime, pantomime

same

to do the same as someone or something

-mort-

mortal, mortician, immortal, mortuary

death

something that can die

-phon-

phonograph, symphony, telephone, phonics

sound

a tool that lets you hear sounds from somewhere else