tamma
The Kannada word for 'brother' is 'ಸಹೋದರ' (sahodara).
In Kannada Language Tamma means younger brother.
In Malayalam, you call a younger brother "Chettan."
You would call your husband's younger brother a brother-in-law.
In Kannada, you can call sister "ತಂಗಿ" (tangi) if she is younger than you or "ಅಕ್ಕ" (akka) if she is older than you.
In Kannada, you can call sister-in-law as "ಅತ್ತೆ" (atte) if she is your brother's wife, and "ಸಹೋದರಿ" (sahodari) if she is your sister's husband's wife.
In Hindi, you would call your father's younger brother "chacha."
Brother in-law
The wife of your brother (younger or older than you) is your sister-in-law.
little brother
Uncle
The word for brother in Tamil is "சகோதரன்" (sakodharan).