What's the adjective for functionally? Here's the word you're looking for.
Included below are past participle and present participle forms for the
verbs function, functionalise, functionalize and functionate which may be used as adjectives within certain contexts.
(medicine) Of a disease, such that its symptoms cannot be referred to any appreciable lesion or change of structure; opposed to organic disease, in which the organ itself is affected.
“The objective is to find the limits within which the device remains functional.”
“This person noted that there wasn't a functional kitchen for the nutrition program, and that the vice-principal's office had to be converted into a kitchen.”
“New, functional lodgings in the suburbs of the city were offered to the inhabitants.”