Definition of tirelessly in US English:

tirelessly

adverb

  • With great effort or energy.

    ‘he worked tirelessly to promote environmental awareness’
    • ‘She tirelessly dusts, polishes, cooks and cleans and then still has the patience to tuck you into bed and read you a story.’
    • ‘This album is tirelessly energetic and full of potential chart hits.’
    • ‘Most teachers I know are working generously and tirelessly for their students.’
    • ‘Tirelessly and in almost complete obscurity, they toil to clean up the environment.’
    • ‘They argue tirelessly with each other about class and race.’

Pronunciation

tirelessly

/ˈtī(ə)rləslē//ˈtaɪ(ə)rləsli/