stiffer
adjective (comparative)UK /ˈstɪfə/
US /ˈstɪfər/
More hard and not easy to bend.
This new rope is stiffer than the old one.
OTHER MEANINGS
2. More difficult or harder to do.
The test was stiffer than last year's.
3. More formal and less friendly in manner.
His greeting was stiffer than usual.
4. Stronger, as of a drink or wind.
The wind grew stiffer as the storm came.
5. More severe or strict.
The school has stiffer rules this year.