unshakable

adjective

un·​shak·​able ˌən-ˈshā-kə-bəl 

: not possible to weaken or get rid of : not able to be shaken

an unshakable habit

unshakable determination/opposition

unshakably

ˌən-ˈshā-kə-blē 

adverb

Switzerland is as unshakably opposed to sanctions as ever: neutrality, the Swiss claim, requires it.

—The Economist

Synonyms of unshakable

• calm
• serene
• nonchalant
• unflappable
• imperturbable
• composed
• nerveless
• unshaken
• cool
• collected

Examples of unshakable in a Sentence

we need the kind of leader who will be unshakable in a national crisis

Recent Examples on the Web

What makes this chaos delightful rather than annoying is Robyn’s unshakable sense of control, grounded in pop principles and thoughtful craft. —Spencer Kornhaber, The Atlantic, 11 Mar. 2026

The actor harnesses raw physicality, steely nerve and unshakable honor to portray an energizing guy taking on an empire. —Brian Truitt, USA Today, 9 Mar. 2026

Khouloud Al Mannai knows there is one thing that can leave an unshakable first — and lasting impression — on any city. —Kenneth R. Gosselin, Hartford Courant, 8 Mar. 2026

Complemented by the opulent classicism of Dolce & Gabbana, which leaned into its signature Sicilian glamour with precision and refined detail, this week reaffirmed Milan as a place where heritage and innovation coexist with unshakable confidence. —Samantha Conti, Footwear News, 2 Mar. 2026

Word History

First Known Use

1611, in the meaning defined above

Rhymes for unshakable

• breakable
• unbreakable
• unmistakable