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Synonyms for Umbrageous (same or very similar meaning)

WordNet sense 1 (filled with shade):
shadowy, shady, shadowed

WordNet sense 2 (protected from heat and light with shade or shadow):

WordNet sense 3 (angered at something unjust or wrong):
indignant, incensed, outraged

WordNet sense 4 (feeling or showing anger):

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