The past tense and past participle of the verb "level" is spelled "leveled" in American English and "levelled" in British English. This difference reflects distinct spelling conventions between the two variants of English.
Both forms are correct within their respective regional standards. "Leveled" follows American English spelling reforms that simplify double letters in verbs ending in -el. "Levelled" adheres to British English rules that retain double consonants in such cases.
Usage depends on geographic context. American publications, including those from the Associated Press and the Chicago Manual of Style, mandate "leveled." British institutions, such as the Oxford University Press and the BBC, use "levelled."
Verbs ending in -el often undergo spelling changes based on pronunciation and regional orthography. For "level," the base form ends in -l, followed by a vowel sound and then -e. The past tense adds -ed.
In American English, double consonants are reduced unless they are pronounced separately. Since the "l" in "level" is not stressed and the syllable is unstressed, the double "l" is dropped. Thus, "level" becomes "leveled."
British English preserves the double "l" in past-tense forms of verbs where the root contains a single consonant followed by a vowel and then another consonant. Therefore, "level" becomes "levelled" to maintain the spelling pattern seen in "travelled," "quarrelled," and "juggled."
The Associated Press Stylebook (2023) states: "Use 'leveled' in American English contexts." This applies to news reporting, academic writing, and official documentation produced in the United States.
Oxford English Dictionary (OED) notes that both spellings have historical roots. "Levelled" appears in 18th-century British texts, while "leveled" emerged in early 19th-century American dictionaries, including Noah Webster's An American Dictionary of the English Language (1828).
When writing for international audiences, consistency matters. A document using "leveled" throughout should not switch to "levelled" in a single instance unless referencing a British source.
Many writers assume one form is incorrect. This is false. Both are valid under their respective standards. Using "leveled" in a UK publication may draw editorial attention, and vice versa.
A frequent error is applying American spelling rules to British contexts. For example, a UK-based company website using "leveled" for "we leveled the playing field" would be inconsistent with local style guides.
Another misconception is that "levelled" implies a stronger action. There is no semantic difference between the two forms. The meaning remains unchanged regardless of spelling.
Consider this sentence: "The construction team leveled the ground before laying the foundation." In American English, this is correct. In British English, it should read: "The construction team levelled the ground before laying the foundation."
Here is a comparison table showing usage across regions:
| Form | American English | British English | Example Sentence |
|---|---|---|---|
| Base verb | level | level | They leveled the site. |
| Past tense | leveled | levelled | She leveled the list. |
| Past participle | leveled | levelled | The project had been leveled. |
For clarity, always match the spelling to the intended audience. If writing for a U.S.-based magazine, use "leveled." For a British academic journal, use "levelled."
I once edited a technical manual for a multinational engineering firm. The original draft used "leveled" throughout. After reviewing the client's regional guidelines, we changed all instances to "levelled" for the UK print run. The change was accepted without comment from editors familiar with British standards.
When in doubt, consult the style guide of the publication or organization. The AP Stylebook and the Oxford Style Guide provide definitive rulings.
Understanding the difference between "levelled" and "leveled" ensures accuracy and professionalism in written communication. Both forms are correct-just not interchangeable across regions.
Always verify spelling against the appropriate regional standard. The choice between "levelled" and "leveled" is not about correctness but about context and audience.