This is the 7574th most frequent French word.
ris
"Ris" means "sweetbreads" (culinary term) or "laughs" (plural form of "ri" from old French for laughter).
Here, 'ri' is the past participle of the verb 'rire' (to laugh), used in the past tense.
Les enfants ont ri toute la journée.
The children laughed all day.
In this sentence, 'ris' represents plural 'laughs' or laughter, used poetically or formally.
Son sourire était éclatant, et cela a fait élever des ris parmi nous.
Her smile was radiant, and it caused laughter among us.
Here, 'ris' is the first-person singular present form of the verb 'rire'.