Simple past tense and past participle of brother.(verb)
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Use "brothered" in a sentence
"I noted that he 'brothered' me, and was angry and put my foot down."
"For the Boy had Irish blood in his veins; and the initial difficulty over, he found it an unspeakable relief to disburden his soul to the man who had "brothered" him ever since he joined the Force."
"Here the government wants the people to think that what they say or do is being big-brothered."