1. in a worthless manner

Nuttall's Standard dictionary of the English language By Nuttall, P.Austin

• qorthlessly,
• aorthlessly,
• sorthlessly,
• eorthlessly,
• 3orthlessly,
• 2orthlessly,
• wirthlessly,
• wkrthlessly,
• wlrthlessly,
• wprthlessly,
• w0rthlessly,
• w9rthlessly,
• woethlessly,
• wodthlessly,
• worthlesely,
• worthlessely,
• worthlesly,
• worthlessy,
• worthlessez,
• worhtlesses

• wordlessly,
• worthless,
• worthlessness,
• worthwhileness,
• worthley,
• worthily,
• wordless,
• worthwhile.

The adjective form of the word "worthlessly" is "worthless".