grammaticaly

Grammaticaly is commonly presented as a misspelling of the adverb grammatically. The correct form grammatically is derived from the adjective grammatical, plus the adverbial suffix -ly, and is used to indicate that an action or idea relates to grammar or adheres to grammatical rules. There is no independent sense of grammaticaly in standard English.

As a nonstandard variant, grammaticaly is found primarily in informal writing or typographical errors, and occasionally in optical character recognition outputs. Most reputable dictionaries do not list grammaticaly as a valid word. Spell-checkers typically flag it as incorrect and suggest grammatically instead.

Examples: "The sentence is grammatically correct" versus "The sentence is grammaticaly correct" — the latter is incorrect.