gain weight — become heavier
collocationB1IELTS 5+neutralcommon
To become heavier, usually because of eating more or exercising less.
Say it like a native
Textbook I have accrued additional body mass.
Native I've gained some weight.
'Accrued additional body mass' is clinical; 'gain / put on weight' is natural.
Pattern: gain weight
In use
- I tend to gain weight easily if I stop exercising.health
- Many people gain weight when they start working in an office because they move less during the day.IELTS speaking
Common mistake
✗ I gained some weights over winter.
✓ I gained some weight over winter.
Uncountable — no 's' ('weights' = dumbbells).
Common collocations
gain weight— put on, some, a bit of, easily
Don't confuse it
The opposite is 'lose weight,' which means to become lighter.