say it: STRENG-thuhnd
strengthened is an adjective meaning "given added strength or support". It is pronounced /ˈstɹɛŋθənd/ — STRENG-thuhnd. It carries one recorded sense.
given added strength or support
“reinforced concrete contains steel bars or metal netting”
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 strengthened 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.