Syllable division derived from spelling — this word is not in the pronouncing dictionary, so no phonetic transcription is shown rather than a guessed one.
unwearying is an adjective meaning "showing sustained enthusiastic action with unflagging vitality". It carries one recorded sense.
showing sustained enthusiastic action with unflagging vitality
“an indefatigable advocate of equal rights”
“a tireless worker”
“unflagging pursuit of excellence”
Definitions, synonyms and semantic relations for unwearying come from Princeton University’s WordNet. Commonness is measured against a corpus of everyday English. Full sources and licences.