It is the base part of a word that has prefixes or suffixes. For instance, the word:
decentralization
base: Centralize
prefix: de-
suffix: -tion
necessity
base: necessary
suffix: -ity
The stem word for slyly is sly.
The stem of the word monotonous is monotony.
The stem for the word "scoundrel" is "scoundr-".
The word stem for archaeology is "archaeo."
it is the stem
a stem of course
The answer would be Dominate
math stem
clothes
The stem word for "away from off" is "away."
stalk
The flower has a long stem.