Here’s a list of 100 basic opposite pairs of English words suitable for beginner students:

Big - Small
Hot - Cold
Fast - Slow
Up - Down
Happy - Sad
In - Out
Day - Night
Young - Old
Easy - Hard
Full - Empty
High - Low
Light - Dark
Right - Left
Open - Closed
Start - Stop
Tall - Short
New - Old
Wet - Dry
Soft - Hard
Heavy - Light
Thick - Thin
Near - Far
Early - Late
Long - Short
Strong - Weak
Wide - Narrow
Rich - Poor
Clean - Dirty
Empty - Full
Warm - Cool
Smooth - Rough
Bright - Dim
Shallow - Deep
Inside - Outside
Safe - Dangerous
Soft - Firm
Happy - Unhappy
Kind - Cruel
Sweet - Sour
Alive - Dead
Quiet - Loud
Young - Old
Healthy - Sick
Strong - Fragile
Open - Shut
Wet - Dry
Same - Different
True - False
Polite - Rude
Sweet - Bitter
Brave - Cowardly
Clear - Cloudy
Sharp - Dull
Even - Odd
Safe - Unsafe
Big - Tiny
Top - Bottom
On - Off
Expensive - Cheap
Thin - Fat
Hot - Cool
Yes - No
Push - Pull
Clean - Messy
Light - Heavy
Near - Distant
Win - Lose
Quiet - Noisy
Left - Right
Bright - Dull
Come - Go
Love - Hate
Above - Below
Fast - Slow
Sit - Stand
Strong - Weak
Cool - Warm
Healthy - Unhealthy
Few - Many
Soft - Hard
Fat - Slim
Rough - Smooth
Deep - Shallow
Open - Closed
Big - Little
Tall - Short
Light - Heavy
Thick - Thin
Young - Old
Bright - Dark
Quick - Slow
Easy - Difficult
Clean - Dirty
Near - Far
Warm - Cool
Hard - Soft
Strong - Weak
Early - Late
Full - Empty
Rich - Poor
These word pairs are great for beginner students to start understanding basic opposites in English.