say it: rah-bi-TUHS-in
robitussin is a noun meaning "trade name of an expectorant that loosens phlegm and makes it easier to cough up". It is pronounced /ˌɹɑbɪˈtʌsɪn/ — rah-bi-TUHS-in. It carries one recorded sense.
trade name of an expectorant that loosens phlegm and makes it easier to cough up
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 robitussin come from Princeton University’s WordNet. The pronunciation comes from the CMU Pronouncing Dictionary. Commonness is measured against a corpus of everyday English. Full sources and licences.