Syllable division derived from spelling — this word is not in the pronouncing dictionary, so no phonetic transcription is shown rather than a guessed one.
untrammelled is an adjective meaning "not confined or limited". It carries one recorded sense.
not confined or limited
“the gift of a fresh eye and an untrammeled curiosity”
“the untrammeled rush that the snows had shown in the first spring sun”
Definitions, synonyms and semantic relations for untrammelled come from Princeton University’s WordNet. Commonness is measured against a corpus of everyday English. Full sources and licences.