In Tamil, elder sister is called "அக்கா" (Akka).
akka .. for elder thangai for younger
Your brother's wife is your sister-in-law.
sister in law
noona for elder sister 누나- that is how you right it
While generally referred to as a Sister-in-law, there is no relationship.
Sister-in-Law
sister in law
Sister In law
In Malayalam, 'sister' means 'Sahodhari'. (Chechy = elder sister, Anujathy = younger sister)
just call her by her first name, she is no relation to you.
He will be called ' massi ka beta' or one can simply call cousin.