Webster's Revised Unabridged Dictionary · 1913

Riant

Riant , adjective

[French riant, present participle of rire to laugh, Latin ridere.]

Laughing; laughable; exciting gayety; gay; merry; delightful to the view, as a landscape.
In such cases the sublimity must be drawn from the other sources, with a strict caution, howewer, against anything light and riant. — Burke