Syllable division derived from spelling — this word is not in the pronouncing dictionary, so no phonetic transcription is shown rather than a guessed one.
cumbrous is an adjective meaning "difficult to handle or use especially because of size or weight". It carries one recorded sense.
difficult to handle or use especially because of size or weight
“a cumbersome piece of machinery”
“cumbrous protective clothing”
Forms marked · are formed by the regular rule rather than recorded in the source data. English keeps a few hundred irregulars and the rest follow the pattern, so the rule is right far more often than not — but it is a rule, and the mark says so.
Definitions, synonyms and semantic relations for cumbrous come from Princeton University’s WordNet. Commonness is measured against a corpus of everyday English. Full sources and licences.