Antonyms of adj unfunctional

1 sense of unfunctional

Sense 1
unfunctional -- (not related to or suitable for everyday needs or activities)

INDIRECT (VIA impractical) -> practical -- (concerned with actual use or practice; "he is a very practical person"; "the idea had no practical application"; "a practical knowledge of Japanese"; "woodworking is a practical art")

Similarity of adj unfunctional

1 sense of unfunctional

Sense 1
unfunctional -- (not related to or suitable for everyday needs or activities)
       => impractical (vs. practical) -- (not practical; not workable or not given to practical matters; "refloating the ship proved impractical because of the expense"; "he is intelligent but too impractical for commercial work"; "an impractical solution")