Riáis

Riáis is a Spanish verb form. Specifically, it is the second-person plural imperative (vosotros/vosotras) form of the verb reír. Reír is an irregular verb in Spanish that means "to laugh." The imperative mood is used to give commands or make requests. Therefore, "riáis" translates to "laugh" when addressing a group of people informally (vosotros/vosotras).

The verb reír belongs to the third conjugation, ending in -ir. Its conjugation in the imperative is irregular, particularly for the vosotros/vosotras form. Unlike regular -ir verbs where the vosotros imperative typically ends in -id, reír follows a different pattern. The stem changes from "re" to "ri" in many forms, including the imperative.

The form "riáis" is used in Spain when speaking to a group of people you would address with "vosotros" or "vosotras." In most Latin American countries, the "ustedes" form is used for both formal and informal plural address, and the equivalent imperative would be "rían" (from the third-person plural present subjunctive used as the ustedes imperative). Therefore, the usage of "riáis" is primarily confined to Peninsular Spanish. An example sentence could be "¡Riáis a gusto en la fiesta!" meaning "Laugh heartily at the party!"