What is the meaning of vinegar in Tamil?

The word for vinegar in Tamil is "வினிகர்" (vinigar). It's a direct borrowing from the English word "vinegar".

While there are some words in Tamil that refer to the process of fermenting or souring liquids, like "புளித்தல்" (puliththal) which means "fermentation", there isn't a specific word for vinegar in Tamil that isn't borrowed from another language.