๐ฝ๐ฟ๐ผ๐ฏ๐น๐ฒ๐บ+๐ถ๐ฐ โ problem๐๐งic
๐ต๐ฎ๐ฏ๐ถ๐+๐ฎ๐น โ habit๐จal
๐ต๐ผ๐ฟ๐ถ๐๐ผ๐ป+๐ฎ๐น โ horizon๐งal
๐ฝ๐ฒ๐ฟ๐๐ผ๐ป๐ถ๐ณ๐+๐ฎ๐๐ถ๐ผ๐ป โ personifi๐ation
๐ฐ๐ผ๐บ๐ฝ๐ฒ๐น+๐ถ๐๐ฒ โ comp๐จ๐๐ฆive
(examples from Burzio, 2002)
Note that -๐ฎ๐น specifically does not combine with words that are already adjectives (sadโ*sadal, strongโ*strongal).
Historical shouldn't exist because Historic is already an adjective. Cyclical shouldn't exist because Cyclic is already an adjective. And so on: Classical, Comical, Symmetrical
We gain expressivity at the small cost of morphological irregularity
Unloosen - to loosen
Unthaw - to thaw
Unravel - to ravel
One day no one will notice Irregardless as unusual, either.