IPA: //ˈdʒɛlɪɡnaɪt//
KK: /ˈdʒɛlɪɡnaɪt/
A type of explosive made from a mixture of nitroglycerin and other materials, used in construction and demolition.
The construction crew used gelignite to break through the rock.
Gelignite is formed from "gel" (meaning a jelly-like substance) and "nit" (short for nitroglycerin, which is derived from the Latin "nitrum", meaning saltpeter). The word describes a gelatinous explosive substance made from nitroglycerin.
Think of a jelly-like substance ('gel') that is explosive ('nit') — that's why gelignite refers to this type of explosive.