Definition of uncertainly in US English:

uncertainly

adverb

  • With a lack of confidence or certainty.

    ‘he thought for a moment before nodding uncertainly’
    ‘the men glanced uncertainly between themselves’
    • ‘Hung uncertainly from the building, the sunshades are precast concrete on the upper level and, on the lower one, black metal.’
    • ‘"Good," he said uncertainly, because he had to say something.’
    • ‘The guard bit his lip uncertainly.’
    • ‘His spirit rises up and hovers uncertainly over proceedings.’
    • ‘It was an ingenious but uncertainly developed theme of skipping skeletons and skulls descending hellward.’

Pronunciation

uncertainly

/ˌənˈsərt(ə)nli//ˌənˈsərt(ə)nlē/