形容詞 riant:

1. showing or feeling mirth or pleasure or happiness
   同義詞：laughing

ri.ant

adj.（形容詞）
Cheerful; mirthful.
歡樂的，愉快的；歡笑的，高興的

來源：
French [present participle of] rire [to laugh]
French [present participle of] rire [to laugh]
from Old French
from Old French
from Latin rodôre
from Latin rodôre