A hole that permits touch or contact, often in the context of firearms where it refers to the channel that allows the ignition of the gunpowder.

स्पर्श छिद्र

English Usage: The gunsmith explained the function of the touch hole in the flintlock rifle.

Hindi Usage: शस्त्र निर्माता ने फ्लिंटलॉक राइफल में स्पर्श छिद्र के कार्य के बारे में समझाया।