continuous feelings of worry about your work or personal life, that prevent you from relaxing [↪ strain]:
worry[uncountable and countable]
Your headaches are due to stress.
Janet's been under a lot of stress since her mother's illness.
the stresses and strains (=problems and worries) of public life
stress-related (=caused by stress) medical problems
Yoga is excellent for relieving stress.
the physical force or pressure on an object:
force[uncountable and countable]TEMHP
Shoes with high heels put a great deal of stress on knees and ankles.
the special attention or importance given to a particular idea, fact, or activity [= emphasis]
put/lay stress on something
Pugh laid particular stress on the need for discipline.
the degree of force or loudness with which a part of a word is pronounced or a note in music is played, which makes it sound stronger than other parts or notes