If you take the case ending off a noun you are left with the stem.
The stem of a verb is the part of the verb that carries its basic meaning. The form λυομεν means “we loose.” The stem is λυ-. Distinguish stem from lexical form.
In Hebrew, a verb stem is an offshoot of the root that is used to indicate the properties of voice and aspect. There are seven major stems, each with its own characteristics: