say it: PEN-uh-tray-tur
penetrator is a noun meaning "an intruder who passes into or through (often by overcoming resistance)". It is pronounced /ˈpɛnəˌtɹeɪtɚ/ — PEN-uh-tray-tur. It carries one recorded sense.
an intruder who passes into or through (often by overcoming resistance)
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 penetrator 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.