Cambridge marks adverbial “backwards” as mainly UK and notes that US English usually uses “backward.” The guide treats the choice as a documented variant boundary rather than assuming that one form is universally incorrect.
ReviewedEvidence1 sourceSectionEnglish Usage
Quick answer
For the directional adverb, both occur; “backwards” is mainly UK, while US English usually prefers “backward.”
Key details
Confusion Familyregional-variant
Rule Familyregional-usage
TermsBackward, Backwards
Variant ScopeCambridge marks adverbial “backwards” as mainly UK and notes that US English usually uses “backward.”
Further guidance
Core difference
The directional adverb expresses movement or orientation toward the back.
Style Boundary
Do not extend the adverb preference mechanically to every adjective or fixed expression; follow the sense and house style.
Sources and evidence
Sources are shown with the role they play in this guide. Historical or style-sensitive claims are kept within the evidence boundary described above.
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