Synonyms

toughen

American

[tuhf-uhn] / ˈtʌf ən /

verb (used with or without object)

to make or become tough or tougher.

Synonyms:

stiffen, strengthen, firm, harden

toughen British

/ ˈtʌfən /

verb

to make or become tough or tougher

"Collins English Dictionary — Complete & Unabridged" 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012

Other Word Forms

Derived Forms

toughener

noun

Inflected Forms

Participles

Conjugated Forms

Present

Past

Future

Etymology

Origin of toughen

First recorded in 1575–85; tough + -en ¹

Example Sentences

Examples are provided to illustrate real-world usage of words in context. Any opinions expressed do not reflect the views of Dictionary.com.

A bipartisan bill released Thursday would toughen penalties against preparers who improperly handle returns.

From MarketWatch • Feb. 27, 2026

Australia's leaders have agreed to toughen laws that allowed Sajid Akram to own six guns.

From Barron's • Dec. 18, 2025

Such prohibitions exist in dozens of states, but many doctors, nurses and policymakers want to toughen them up as a buttress against private equity’s influence in the sector.

From The Wall Street Journal • Oct. 7, 2025

City Section teams continue to struggle against Southern Section opponents in nonleague games, but many are using the strategy Birmingham has used for years to toughen up before league play begins.

From Los Angeles Times • Sep. 8, 2025

“I can make you an ointment for that,” said Haldon, “and there are certain mineral salts that will toughen your skin.”

From "A Dance with Dragons" by George R. R. Martin

Definitions and idiom definitions from Dictionary.com Unabridged, based on the Random House Unabridged Dictionary, © Random House, Inc. 2023