doubley

Doubley is a nonstandard spelling of the English adverb meaning twofold or in two ways. In standard usage, the correct form is doubly. Because doubley is not recognized by major dictionaries, it is usually considered a misspelling or typographical error in formal writing, and writers are advised to use doubly instead.

Etymology and usage notes: Doubly is formed from the adjective double plus the suffix -ly, following normal English morphology. The spelling doubley would differ from the standard form by retaining the e before the suffix, which is not the accepted convention in contemporary English.

Typical contexts: Doubly is used to intensify an adjective or to describe twofold aspects, as in "The task is doubly difficult" or "It is a doubly important issue." It is also used in technical phrases such as "doubly linked list" or "doubly stochastic matrix," where doubly functions as an adverbial or adjectival modifier within a compound term. If you encounter doubley in such contexts, it is almost certainly a misspelling or a stylistic deviation.

Proper names and branding: Outside of standard language, Doubley might appear as a proper noun, brand name, or fictional character. In these cases, capitalization and branding choices determine its meaning, and it should be treated as a noun rather than an adverb.

Summary: The accepted adverb form is doubly. Doubley is generally considered incorrect in formal writing, though it may appear in informal text or as a brand name. When clarity and correctness are priorities, use doubly.