Which of these actors reportedly gained the most weight for a movie role? robert de niro bradley cooper christian bale vincent d’onofrio

Vincent D'Onofrio

Explanation:

D'Onofrio gained almost 70 pounds for his role in Stanley Kubric's Full Metal Jacket.  Robert de Niro had gained 65 pounds for the Scorssese film (and Oscar for him) Raging Bull.

Christian Bale has gained and also lost weight for several roles

Vincent D'Onofrio

Explanation:

    Many must remember Stanley Kubrick's disturbing Full Metal Jacket (1987) film. Vincent D’Onofrio - who studied at Actors Studio - was that psychopathic overweight, the character Private Pyle. D’Onofrio put on 72 pounds to play the role (which is an incredible test of selflessness).

your word would be isle.

isle is an island or peninsula especially a small one.

if you add the letter "a" you get aisle, which is a passage between 2 rows of something like chairs, shelves, or something else.