"Truly" is the correct spelling — "truely" is a common misspelling that doesn't exist as a standard English word, in either American or British English (as defined in the Merriam-Webster Dictionary).
Why the Mistake Happens
The confusion comes from the general rule that adverbs are formed by adding "-ly" to an adjective, which usually keeps the base word intact (quick → quickly, sad → sadly, careful → carefully). Since the adjective is "true," people naturally assume the adverb should be "truely" to preserve that spelling — but English drops the silent "e" before adding "-ly" in this specific case, making it an exception to the more common pattern. (This is a common source of confusion, similar to other spelling and grammar choices like deciding between was vs were or writing your welcome or you're welcome).
The Rule Behind It
When an adjective ends in a silent "e" preceded by a consonant, that "e" is typically dropped before adding "-ly":
| Adjective | Correct Adverb | Incorrect Version |
|---|---|---|
| true | truly | truely |
| due | duly | duely |
| whole | wholly | wholely |
This is one of a small handful of irregular "-ly" formations in English, which is exactly why it trips people up despite the underlying rule being fairly simple once you know it.
How to Remember It
A simple memory trick: think of "truly" as rhyming with "newly" and "duly" — none of these words keep their final "e." Another approach: remember the phrase "yours truly," a common letter-closing phrase that reinforces the correct spelling through repeated exposure.
Where "Truly" Is Commonly Used
- As a sincerity marker: "I am truly sorry for the mistake."
- In formal letter closings: "Yours truly,"
- As an intensifier: "That was truly impressive."
- In formal or elevated writing to add emphasis: "She was truly dedicated to the project."
Some autocorrect and spell-check tools, especially older or less sophisticated ones, can occasionally miss "truely" because it superficially resembles a plausible English spelling pattern. Modern spell-checkers reliably flag it, but it's worth double-checking manually in professional correspondence.
A quick self-test: say the word "true" out loud, then simply add "-ly" without thinking about the spelling — most people naturally pronounce it as "true-lee," which matches the correct written form "truly" once you drop the silent e.
Frequently Asked Questions
Is "truely" ever considered correct in any dialect of English?
No — "truely" is not recognized as correct in American, British, Australian, or any other major English variant; it's classified purely as a spelling error regardless of region or dialect.
Why doesn't spell-check always catch "truely"?
Most modern spell-checkers do catch it, but some older or less rigorous tools may miss it since "truely" superficially resembles a plausible English word pattern.
Are there other "-ly" words that drop letters like this?
Yes — "wholly" (from "whole") and "duly" (from "due") follow the identical pattern of dropping the silent "e" before adding "-ly."
Is "truly" used differently in British vs. American English?
No — unlike many other words covered elsewhere, "truly" is spelled and used identically across all major English varieties, with no regional variation.
💡 The Takeaway
Group "truly" with "duly" and "wholly" in your memory — all three drop the silent "e" before adding "-ly," and none of them keep the base spelling intact.
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