As an adjective unsmiling
is not smiling; serious or grave.
As a noun unsoiling is
the act or process of stripping the surface of dirt or soil from the top of a quarry, claybed, etc.
unsmiling
English
Adjective
(-)
Not smiling; serious or grave
Antonyms
* smiling
unsoiling
English
Noun
(-)
The act or process of stripping the surface of dirt or soil from the top of a quarry, claybed, etc.