Definition of sub rosa in English:

sub rosa

Syllabification: sub ro·sa
Pronunciation: /ˌsəb ˈrōzə
 
/

adjective & adverb

formal

Origin

Latin, literally 'under the rose', as an emblem of secrecy.

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Word of the day kerf
Pronunciation: kərf
noun
a slit made by cutting with a saw