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regicide

1 ENTRIES FOUND:
regicide /ˈrɛʤəˌsaɪd/ noun
plural regicides
regicide
/ˈrɛʤəˌsaɪd/
noun
plural regicides
Britannica Dictionary definition of REGICIDE
[noncount] : the crime of killing a king or queen
[count] : someone who kills a king or queen