tamma
"younger brother" in spoken Kannada is tamma. It's a noun (masculine) that you'll first encounter in Lesson 13: Did You Bring Me Something? of the KannadaMaadi course, where Anu and Ravi use it in context.
Grammar note cognate with Tamil tambi, Telugu tammuḍu
Heard in a real Bengaluru conversation
Words land faster when you hear them inside a real sentence. tamma is used in Lesson 13 (Did You Bring Me Something?, CEFR A2) — a short audio conversation between Anu and Ravi set in a recognisable Bengaluru situation.
Open Lesson 13 →