bulked up in English:

The cheers swelled to a roar.

The turnover on the Tokyo stock Exchange swelled to the year's record.

Thanks to a fundamental restructuring, our surplus has swelled three-fold.

A gust of wind swelled the sails.

The membership of the Boy Scout troop swelled.

In the 19th century, the number of immigrants swelled rapidly.

Our surplus has swelled by nearly ten percent in this quarter.