@KevinAClark,
The word for smile is
rideo or
subrideo.
The imperative singular is
ride or
subride.
The imperative plural is
ridite or
subridite.
For "in the face of" you could say
contra or
coram.
Contra implies defiance;
coram implies "in the presence of".
You could also use adversa for for "adversity".
As I think about it, I might suggest
Subride coram adversis if asked again.