Definitions of swell:

• noun:   a crescendo followed by a decrescendo
• noun:   the undulating movement of the surface of the open sea
• noun:   a rounded elevation (especially one on an ocean floor)
• noun:   a man who is much concerned with his dress and appearance
• verb:   expand abnormally

  Example: "The bellies of the starving children are swelling"

• verb:   cause to become swollen

  Example: "The water swells the wood"

• verb:   become filled with pride, arrogance, or anger

  Example: "The mother was swelling with importance when she spoke of her son"

• verb:   increase in size, magnitude, number, or intensity

  Example: "The music swelled to a crescendo"

• verb:   as of feelings and thoughts, or other ephemeral things

  Example: "Smoke swelled from it"

• verb:   come up
• adjective:   very good
• name:  A surname (very rare: popularity rank in the U.S.: #67353)