1. In a dubious manner.

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

• deliously,
• abiously,
• dubiouse,
• obiously,
• subiously,
• xubiously,
• fubiously,
• rubiously,
• eubiously,
• dybiously,
• dhbiously,
• djbiously,
• dubiusly,
• dubiosly,
• dubiosuly,
• dubioulsy,
• tuniously,
• dutiously,
• dubiusuly,
• dubioulsuly

• deviously.

The adjective form of the word "dubiously" is "dubious".

The plural form of the word "dubiously" is "dubiouslies".

The singular form of "dubiously" is "dubious"