tiṅgaḷu
"month" in spoken Kannada is tiṅgaḷu. It's a noun (neuter) that you'll first encounter in Lesson 8: Nice to Meet You — Office Introductions of the KannadaMaadi course, where Anu and Ravi use it in context.
Grammar note takes -inda (ablative): tiṅgaḷinda = 'since/for months'
Heard in a real Bengaluru conversation
Words land faster when you hear them inside a real sentence. tiṅgaḷu is used in Lesson 8 (Nice to Meet You — Office Introductions, CEFR A2) — a short audio conversation between Anu and Ravi set in a recognisable Bengaluru situation.
Open Lesson 8 →