1. That is wielded with difficulty; unmanageable; penderous.

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

• unvield,
• inwieldly,
• unwieldly,
• unweildy,
• unworldy,
• unwiedly,
• unwearey,
• unweldy,
• unwield,
• unwilld,
• unwoodd,
• unweeld,
• unweeldy,
• unwedly,
• unwieldily,
• unyieldd,
• unweidly,
• Unnaild,
• Unpriely,
• Unwilley

• unmelted,
• unliterary,
• unmilitary,
• unyielding,
• unmelodious,
• unmelodic,
• unoiled,
• unwilled.

The adverb form of "unwieldy" is "unwieldily".

The adjective form of the word "unwieldy" is "unwieldy".

The plural form of the word "unwieldy" is simply "unwieldy." The word is an adjective and does not change its form in the plural.

The singular form of "unwieldy" is "unwieldiness"