IPA: /ˈtʌfər/
KK: /tʌfər/
Having a strong and durable quality; able to withstand difficult conditions or challenges.
The new material is tougher than the previous version, making it more suitable for extreme weather.
Tougher → It is formed from "tough" (from Old English *tōh*, meaning strong or resilient) and the comparative suffix "-er" (meaning more). The word "tougher" means more strong or resilient than something else.
Think of someone or something that is 'strong' ('tough') and then imagine them being 'more' strong with the '-er' added. This helps you remember that 'tougher' means more resilient.