Correct spelling


Correct spelling, explanation: specially is an adverb, so it is made by adding suffix -ly to the adjective. When we add -ly to the adjective special we receive the form specially, with double l. We do not skip one l, but we simply merge these two components, so specialy is an incorrect spelling.

Definition of specially:
adverb, in a special way
This bathroom is specially prepared for people with disabilities.
He is very tall so his suit was specially tailored.

Incorrect spelling


Incorrect spelling, explanation: this form is incorrect because there is one l missing: since specially is the adjective special with suffix -ly there are two l’s in the final form. Therefore the correct spelling is specially, not specialy.