Tra từ stem - Từ điển Oxford Advanced Learner 8th

stem [stem stems stemmed stemming] noun, verb BrE [stem] NAmE [stem]
noun
1. the main long thin part of a plant above the ground from which the leaves or flowers grow; a smaller part that grows from this and supports flowers or leaves
•long, trailing stems of ivy
•a tall plant with branching stems
2. the long thin part of a wine glass between the bowl and the base
3. the thin tube of a ↑tobacco pipe
4. -stemmed (in adjectives)having one or more stems of the type mentioned
•a long-stemmed rose
•slender-stemmed wine glasses
5. (grammar)the main part of a word that stays the same when endings are added to it
•‘Writ’ is the stem of the forms ‘writes’, ‘writing’ and ‘written’.

Word Origin:
n. and Old English stemn stefn Germanic Dutch stam German Stamm Dutch steven German Steven v. Middle English ‘to stop, delay’ Old Norse stemma Germanic

Example Bank:
•There are several leaves on each stem.
•When the bush has finished flowering, cut back all the stems.
Idiom: ↑from stem to stern
Derived: ↑stem from something

verb (-mm-)~ sth
to stop sth that is flowing from spreading or increasing
•The cut was bandaged to stem the bleeding.
•They discussed ways of stemming the flow of smuggled drugs.
•The government had failed to stem the tide of factory closures.
Verb forms:

Word Origin:
n. and Old English stemn stefn Germanic Dutch stam German Stamm Dutch steven German Steven v. Middle English ‘to stop, delay’ Old Norse stemma Germanic

Language Bank:
because of
Explaining reasons
▪ The number of people with diabetes is growing, partly because of ▪ an increase in levels of obesity.
▪ The number of overweight children has increased dramatically in recent years, largely as a result of ▪ changes in diet and lifestyle.
▪ The increase in childhood obesity is largely due to ▪ / the result of ▪ changes in lifestyle and diet over the last twenty years.
▪ Many obese children are bullied at school on account of ▪ their weight.
▪ Part of the problem with treating childhood obesity stems from ▪ the fact that parents do not always recognize that their children are obese.
▪ Childhood obesity may be caused by ▪ genetic factors, as well as environmental ones.
Language Banks at ↑cause, ↑consequently, ↑therefore

Example Bank:
•The reforms failed to stem social discontent.
•They discussed ways to stem the flow of drugs.