Antonyms of adj attachable

1 sense of attachable

Sense 1
attachable (vs. detachable) -- (capable of being fastened or added to something else; "a handle attachable by two bolts")

detachable (vs. attachable) -- (designed to be unfastened or disconnected without damage; "shirts with detachable collars")
        => clastic -- (capable of being taken apart; "the professor had a clastic model of the human brain")

Similarity of adj attachable

1 sense of attachable

Sense 1
attachable (vs. detachable) -- (capable of being fastened or added to something else; "a handle attachable by two bolts")
       => bindable, bondable -- (capable of being fastened or secured with a rope or bond)
       => clip-on -- (attachable by a clip; "clip-on earrings"; "a clip-on bow tie")
       => tie-on -- (fastened by tying on; "tie-on labels")