The TuLu word ‘ naDeer’ has certain poetic charms in it. It is usually employed in the rural side to denote that it has become dark (like, for example: naDeer aanD!). But original meaning of the term must have been ‘the ’. naD′ (=middle)+ir (=night)>naDeer.
The specialty here is that ‘ir’ which we generally presume to be the root (dhaatu) of ‘irl’ or ‘iruluu’ is used as independent word to mean ‘the night’. The word iruLu (=night) is also common to Kannada.