This is the 33rd most frequent Hindi word.
इन
The Hindi word "इन" translates to "these" or "in them" in English, depending on context.
Here, 'इन' means 'these' and is used as a demonstrative adjective referring to 'books'.
इन किताबों को पढ़ना ज़रूरी है।
It's important to read these books.
In this sentence, 'इन' represents 'them' in the dative/ablative case with postposition 'से'.
मैंने इन से मदद ली थी।
I took help from them.
'इन' is used to mean 'these' days, representing a time period.