stem

US /stem/
UK /stem/
"stem" picture
1.

the main body or stalk of a plant or shrub, typically rising above ground but occasionally subterranean.

:
The rose stem had sharp thorns.
She carefully cut the flower at the base of its stem.
2.

the main part of a word, to which inflections or other affixes are added.

:
In the word 'unhappiness', 'happy' is the stem.
Understanding the stem helps in analyzing word families.
1.

originate in or be caused by.

:
His problems stem from a lack of organization.
The river stems from the mountains.
2.

stop or restrict (the flow or spread of something).

:
The government is trying to stem the flow of illegal immigration.
They built a dam to stem the floodwaters.