To become proud. (Often written as puffed up with pride.)
To inflate with air.
To swell due to injury or illness.
To fluff up, such as an animal raising its fur or feathers to appear larger or conserve body heat.
To strengthen; to confirm.
To become thicker (in the sense of wider).
To become thicker (in the sense of more viscous).
To make thicker (in the sense of more viscous).
To make thicker (in the sense of wider).
To make more frequent.