ગીત ગાવું

Usually, we use 'Tahukvu' for birds like peacocks or 'Bolvu' for general birds, but in poetry, you can say 'Pankhi gīt gāy che'.

It is neuter (Napuṃsakliṅg). This is why we say 'Sāruṃ Gīt' and 'Gāyuṃ'.

'Gāyak' is the noun (singer), and 'Gāvuṃ' is the verb (to sing).

You say 'Huṃ gīt gāvuṃ śikhuṃ chuṃ'.

People sometimes use 'Lalkarvu' or 'Fatkaaryu' (in past tense) to mean they sang something energetically.

Not necessarily. 'Huṃ gīt gāuṃ chuṃ' can mean 'I am singing a song' or 'I sing songs' depending on context.

For rapping, people usually say 'Rap karvu', but 'Gāvuṃ' is still understood.

There isn't a direct opposite, but 'Chup rahevu' (to stay silent) or 'Sāmbhaḷvu' (to listen) are the functional opposites.

'Gāṇuṃ' is a more colloquial, slightly more informal word for song. It is very common in rural areas.

Yes, if the poem is being sung to a tune. If just recited, use 'Pathan karvu'.