noun
brotherly love; fraternal love
Refers to love and solidarity among people who share a common bond, such as nationality, ethnicity, or faith. Often used in religious, political, or humanitarian contexts.
彼の演説は同胞愛の精神に満ちていた。
His speech was filled with the spirit of brotherly love.
友愛 is broader, meaning 'friendship' or 'fraternity' in general, while 同胞愛 specifically emphasizes love among people of the same group or nation.
Compound of 同胞 (どうほう, 'brethren, fellow countryman') and 愛 (あい, 'love'). The term is a straightforward Sino-Japanese construction.