1. In a harmless manner.

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

• harmlesss,
• amlessly,
• shamlessly,
• garmlessly,
• barmlessly,
• narmlessly,
• jarmlessly,
• uarmlessly,
• yarmlessly,
• hzrmlessly,
• hsrmlessly,
• hwrmlessly,
• hqrmlessly,
• haemlessly,
• harmlesly,
• hearlessly,
• hardledly,
• hartlesly,
• hartelessly,
• hartlessley

• harmless.

The adjective form of "harmlessly" is "harmless".

The plural form of the word "harmlessly" is "harmlessly". The word does not change in the plural form.

The singular form of the word "harmlessly" is "harmlessly". The term does not change in form when singular or plural.