1. So as not to be visible.

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

• invaribly,
• invisibile,
• invidible,
• invicible,
• ivisible,
• invinsible,
• invisibale,
• invisble,
• invisibal,
• invisably,
• invisiblity,
• invisisble,
• invisibilty,
• imvisible,
• invissible,
• iinvisible,
• invisiable,
• inevidibly,
• invesible,
• invisabl

• invigilate,
• invigilator,
• infeasible,
• invisibility,
• invisible.

The adjective form of the word "invisibly" is "invisible".

The plural form of the word "invisibly" is "invisibles".

The singular form of the word "invisibly" is "invisible"