Where does “நூலகவியல்” come from?

நூலகவியல் (Tamil) comes from Tamil நூலகம், from Tamil நூல், from Old Tamil 𑀦𑀽𑀮𑁆, from Proto-Dravidian *nūl — thread.

Ancestry of “நூலகவியல்”, step by step

நூலகவியல் traces back through two separate lines of ancestry.

via Tamil நூலகம்

StepLanguageWordMeaning
1Tamilநூலகம்library
2Tamilநூல்book, treatise; systematic doctrine, science;...
3Old Tamil𑀦𑀽𑀮𑁆thread
4Proto-Dravidian*nūlthread

via Tamil இயல்

StepLanguageWordMeaning
1Tamilஇயல்to be able to, be possible
Every word from Proto-Dravidian *nūl