toughen
Toughen (verb) means to make something stronger or more resistant to damage. Example: “The coating is designed to toughen the glass against impacts.”
How to use toughen
Learner’s notesIn plain EnglishTo make something (or someone) stronger, harder, or more resistant.
Word forms
- Third person singular
- toughens
- Past tense
- toughened
Fill the gap
Can you complete this real example?
The coating is designed to _____ the glass against impacts.
Etymology
Formed from tough plus the suffix -en, which turns adjectives into verbs meaning "to make (more) so."