Roots

dict-say
dictater,dictionary,predict,dictate

scrib,script-write
scripture,describe,inscribe,scribble,prescription,manuscript

aud-hear
audience,audio,auditorium,audition

psych-mind
psycho

ped-foot
peddle

man-hand
manicure


As I sit at my desk going through the dictionary, and trying to describe the word auditorium I realize it's really not that hard.

scop-see
microscope,telescope,scope


spec-see
spectacular,spectater,inspect,spectacles


vid-see
video,evidence

terr-land
territory,terrace

mar-sea
marine,maritime

geo-earth
geography,geology

As I was studying my geography while sitting in the submarine, I realized that we hit a territory I did not recognize.