Uncertainly/ʌnˈsɜːrtnli/ Definition 1 of 2Pro Tip 1/3Lack of Confidence Use 'uncertainly' to express someone's lack of confidence in actions or decisions. He replied uncertainly, not sure if his answer was correct. Pro Tip 2/3Physical Gestures 'Uncertainly' often describes physical actions that lack purpose or direction. She looked uncertainly around the room, unable to decide where to sit. Pro Tip 3/3Reflecting Hesitation It conveys hesitation before someone speaks, acts, or makes a decision. He paused uncertainly before crossing the busy street.