Syllable division derived from spelling — this word is not in the pronouncing dictionary, so no phonetic transcription is shown rather than a guessed one.
upholder is a noun meaning "someone who upholds or maintains". It carries one recorded sense.
someone who upholds or maintains
“firm upholders of tradition”
“they are sustainers of the idea of democracy”
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 upholder come from Princeton University’s WordNet. Commonness is measured against a corpus of everyday English. Full sources and licences.