| suitable
| adjective
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| right for a particular purpose or occasion.
| These boots are suitable for walking over rough ground.
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| suitcase
| noun
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| a large bag with a handle that is used for carrying clothing and other things when you travel.
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| sulk
| verb
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| to be silent because you are in a bad mood.
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| sum
| noun
| v1
| a total made by adding two or more numbers together.
| The sum of 3 and 49 is 52.
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| summary
| noun
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| a short form of a story or a piece of information that just gives the main points.
| They gave a summary of the news at the end of the program.
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| summer
| noun
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| the warmest season of the year.
| Summer comes between spring and fall.
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| summit
| noun
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| the highest point of something.
| The two climbers finally reached the summit of the mountain.
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| Sun
| noun
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| the star that is the center of our solar system
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| sun
| noun
| v1
| the light and heat that we get from the Sun.
| The cat was sitting in the sun.
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| sunflower
| noun
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| a tall plant with large, yellow flowers. The seeds can be eaten or used to make cooking oil.
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| sunglasses
| noun
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| glasses with dark lenses that you wear to protect your eyes from sunlight.
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| sunlight
| noun
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| the light from the Sun.
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| sunrise
| noun
| v1
| the time when the Sun is coming up over the horizon in the morning.
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| sunset
| noun
| v1
| the time when the Sun is going down below the horizon in the evening.
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| sunshine
| noun
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| bright sunlight.
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| superb
| adjective
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| extremely good.
| A superb performance.
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| superior
| adjective
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| higher in rank or position. Soldiers must salute their superior officers.
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| tool
| noun
| v1
| a piece of equipment that helps you do a job.
| toolbox
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| supermarket
| noun
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| a large store that sells food and other items. People select the goods they want and pay for them at the exit.
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| supersonic
| adjective
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| faster than the speed of sound.
| The Concorde was a supersonic aircraft.
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| superstition
| noun
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| a false belief based on fear or lack of knowledge about something.
| A common superstition is that it is unlucky to walk under ladders.
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| supper
| noun
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| a meal eaten in the evening.
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| supply
| noun
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| a quantity of something that may be needed.
| The farmer kept a supply of grain in the barn.
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| support
| verb
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| to hold something or someone up to stop it, or them, from falling.
| She supported her friend who had hurt his leg.
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| suppose
| verb
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| to think that something is true or likely.
| I suppose you are right.
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| sure
| adjective
| v1
| certain, or with no doubt.
| I am sure you will enjoy your stay here.
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| surf
| verb
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| to balance on a special board while riding on waves as they begin to break near the seashore.
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| surface
| noun
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| the outside or top of something.
| These buttons have shiny surfaces.
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| surgeon
| noun
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| a doctor who treats patients by doing operations.
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| surgery
| noun
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| a medical operation that involves cutting open part of a patient’s body.
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