Syllable division derived from spelling — this word is not in the pronouncing dictionary, so no phonetic transcription is shown rather than a guessed one.
unstinted is an adjective meaning "very generous". It carries one recorded sense.
very generous
“distributed gifts with a lavish hand”
“the critics were lavish in their praise”
“a munificent gift”
“his father gave him a half-dollar and his mother a quarter and he thought them munificent”
“prodigal praise”
“unsparing generosity”
“his unstinted devotion”
“called for unstinting aid to Britain”
Definitions, synonyms and semantic relations for unstinted come from Princeton University’s WordNet. Commonness is measured against a corpus of everyday English. Full sources and licences.