Vive, viva, and vivat

Viva, vive, and vivat are interjections used in the Romance languages. Viva in Spanish, Portuguese, and Italian, Vive in French, and Vivat in Latin and Romanian are subjunctive forms of the verb "to live". Being the third-person, subjunctive present conjugation, the terms express a hope on the part of the speaker that another should live. Thus, they mean "(may) he/she/it live!" (the word "may" is implied by the subjunctive mood) and are usually translated to English as "long live".