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

a long, thin supportive or main section of something

the root or main part of a word, to which inflections or formative elements are added.

the main upright timber or metal piece at the bow of a ship, to which the ship's sides are joined at the front end

a pipe used for smoking crack or opium.

originate in or be caused by

remove the stems from (fruit or tobacco leaves)

(of a boat) make headway against (the tide or current)

stop or restrict (the flow of something)

slide the tail of one ski or both skis outwards in order to turn or slow down

science, technology, engineering, and mathematics (as an educational category)