Sanku शंकु

Sanskrit word Sanku (Sanskrit शंकु) literally means cone, pillar, dart, spear, arrow or pillar. Sanku also refers to the sine of the altitude or any kind of weapon.

Sanku founds reference in Riga Veda with meanings like nail, spike or a peg. This name also founds reference in Harivansh (हरिवंश) where Sanku is used for a stick.
Mention of Sanku is also found in Mahabharata where this word is used to denote a stake, pillar or post. This name also founds to be mentioned in Sir Monier-Williams dictionary in which this word refers to fear or terror.
Reference of Sanku in Harivansh (हरिवंश) used as an arrow, spear, dart which applied to the " sting " of sorrow. Sanku is an another name of Lord Shiva. As per mentioned in Puranas, Sanku was a son of Hiranyaksa.