Meanings
verb
- participlepastsimple past and past participle of toughen
Two large windows are provided in the front of the cab with a roller type of route indicator between them; both windows and indicator are fitted with ¼-in.-thick toughened plate glass.
1955 June, “Two-Car Electric Units for Tyneside and Southern Region”, in Railway Magazine, page 388
Synonyms & antonyms
adjectivephysically toughened
adjectivemade hard or flexible or resilient especially by heat treatment
Synonym sets from Open English WordNet, CC BY 4.0.
Cite this entry
APA
toughened. (n.d.). In WatkinsX Dictionary. Retrieved November 4, 2026, from https://dictionary.watkinsx.com/word/toughened
MLA
“toughened.” WatkinsX Dictionary, https://dictionary.watkinsx.com/word/toughened. Accessed November 4, 2026.
Chicago
WatkinsX Dictionary, s.v. “toughened,” accessed November 4, 2026, https://dictionary.watkinsx.com/word/toughened.
Source: toughened on Wiktionary, CC BY-SA 4.0.