cross-thread: Nero Wolfe once burned a dictionary because it stated that imply and infer were synonyms.

and Webster's NI3 was (in 1961) roundly criticized for synonymizing dis- and un-interested.
There. Back on the subject.

Dislike and unlike are completely unrelated.

Disapprove and "unapprove" (= rescind) are getting closer.

Uncompliant and non-compliant? Only because the root has different meanings: (compliant = 1)obedient or 2)distensible)