It is Chaachaa. While addressing him, it would be chaachaaji as a mark of respect.
Otouto is younger brother, ani is older brother.
兄: ani (older brother) 弟: otouto (younger brother) the word for older brother is 'o-ni-i-sa-n' the word for younger brother is 'o-to-u-to' (phonetic hiragana spelling)
lil bro
older brother=oniisan younger brother=otooto
Brother
The word for brother in Tamil is "சகோதரன்" (sakodharan).
The Kannada word for 'brother' is 'ಸಹೋದರ' (sahodara).
anisan older ototo younger
Tamru means younger brother. It is a telugu word.
meaning of the Malayalam word anujan is -- " YOUNGER BROTHER "
No specific word for Just Brother. Elder brother means Anna. Most elder brother is periya(big) brother. Younger brother means Thambi. Most younger brother is chinna(small) thambi.
Pinni is known in Telugu as "Father's younger brother's wife OR Mother's younger sister"